CBSE Biology CBSE for 11th Standard CBSE Question paper & Study Materials

11th Biology Biological Classification Chapter Case Study Question with Answers CBSE - by users_admin View & Read

11th Biology The Living World Chapter Case Study Question with Answers CBSE - by users_admin View & Read

CBSE 11th Standard Biology Subject Excretory Products and Their Elimination HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    How do lungs help in excretion?

  • 2)

    What is the ratio of the concentrated filtrate to that of the initial filtrate?

  • 3)

    What will be the effect on the amount of urine released when water is abundant in the body tissues in case of vertebrates?

  • 4)

    Write the mode of excretion performed by Xenopus.

  • 5)

    Give the name of cells that are responsible for the formation of filtration slits or slit pores.

CBSE 11th Standard Biology Subject Excretory Products and Their Elimination HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    How do lungs help in excretion?

  • 2)

    What is the ratio of the concentrated filtrate to that of the initial filtrate?

  • 3)

    What will be the effect on the amount of urine released when water is abundant in the body tissues in case of vertebrates?

  • 4)

    Write the mode of excretion performed by Xenopus.

  • 5)

    Give the name of cells that are responsible for the formation of filtration slits or slit pores.

CBSE 11th Standard Biology Subject Body Fluids and Circulation HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    It is seen that RBC count is more in the persons living at high altitudes. Indicate the reason behind this.

  • 2)

    Why is blood group identification not needed or serum identification?

  • 3)

    What is the effect of dengue fever on the platelets of blood in humans?

  • 4)

    Heart failure is called congestive heart failure. Why?

  • 5)

    Indicate the blood vessel that transports hormones from the hypothalamus to the anterior pituitary.

CBSE 11th Standard Biology Subject Body Fluids and Circulation HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    It is seen that RBC count is more in the persons living at high altitudes. Indicate the reason behind this.

  • 2)

    Why is blood group identification not needed or serum identification?

  • 3)

    What is the effect of dengue fever on the platelets of blood in humans?

  • 4)

    Heart failure is called congestive heart failure. Why?

  • 5)

    Indicate the blood vessel that transports hormones from the hypothalamus to the anterior pituitary.

CBSE 11th Standard Biology Subject Breathing and Exchange of Gases HOT Questions 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    A person dies in an accident in which his chest cavity was punctured, but no lung damage was there. Point out the cause of death.

  • 2)

    Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system. Why?

  • 3)

    Why is breathing of women regarded as thoracic, while that of male as abdominal? Also state who among the two has higher vital capacity.

  • 4)

    State the route of foul air from the lungs to outside. Also state whether TV increases or decreases during excitement and activity.

  • 5)

    Why is it not advisable to sleep in closed rooms warmed with burning of coals continuously?

CBSE 11th Standard Biology Subject Breathing and Exchange of Gases HOT Questions 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    A person dies in an accident in which his chest cavity was punctured, but no lung damage was there. Point out the cause of death.

  • 2)

    Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system. Why?

  • 3)

    Why is breathing of women regarded as thoracic, while that of male as abdominal? Also state who among the two has higher vital capacity.

  • 4)

    State the route of foul air from the lungs to outside. Also state whether TV increases or decreases during excitement and activity.

  • 5)

    Why is it not advisable to sleep in closed rooms warmed with burning of coals continuously?

CBSE 11th Standard Biology Subject Breathing and Exchange of Gases HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In normal breathing, which is the active process inspiration or expiration?Explain.

  • 2)

    What is Adam's apple? Is it more prominent in males or females?

  • 3)

    What makes carbon monoxide more harmful to animals than carbon dioxide?

  • 4)

    How marine mammals are able to make long underwater dives?Explain

  • 5)

    What happens to the respiratory process in a man going up a hill?

CBSE 11th Standard Biology Subject Breathing and Exchange of Gases HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In normal breathing, which is the active process inspiration or expiration?Explain.

  • 2)

    What is Adam's apple? Is it more prominent in males or females?

  • 3)

    What makes carbon monoxide more harmful to animals than carbon dioxide?

  • 4)

    How marine mammals are able to make long underwater dives?Explain

  • 5)

    What happens to the respiratory process in a man going up a hill?

CBSE 11th Standard Biology Subject Breathing and Exchange of Gases HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why is respiration in insect called direct?

  • 2)

    How is negative pressure breathing helpful for mammals?

  • 3)

    Why is it advisable to do nasal breathing rather than mouth breathing?

  • 4)

    What is the role of oxyhaemoglobin after the release of molecular oxygen in the tissue?

  • 5)

    Differentiate between haemoglobin of human and earthworm?

CBSE 11th Standard Biology Subject Breathing and Exchange of Gases HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why is respiration in insect called direct?

  • 2)

    How is negative pressure breathing helpful for mammals?

  • 3)

    Why is it advisable to do nasal breathing rather than mouth breathing?

  • 4)

    What is the role of oxyhaemoglobin after the release of molecular oxygen in the tissue?

  • 5)

    Differentiate between haemoglobin of human and earthworm?

CBSE 11th Standard Biology Subject Digestion and Absorption HOT Questions 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What would happen if the liver does not secrete bile?

  • 2)

    Stomach is the right place where hydrochlotic acid is required to be secreted in the gastric juice. Describe any three points to justify this statement.

  • 3)

    What would happen if for some reason goblet cells become non-functional. Why are these important for digestive system?

  • 4)

    Which part of the alimentary canal produce local digestive hormones? What would happen if these hormones are not produced?

  • 5)

    Out of the parts labelled as A, B, C and D of alimentary canal in the diagram below.Where is the enzyme responsible for the first stage of protein digestion produced?Label all parts, i.e., A-D.

CBSE 11th Standard Biology Subject Digestion and Absorption HOT Questions 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What would happen if the liver does not secrete bile?

  • 2)

    Stomach is the right place where hydrochlotic acid is required to be secreted in the gastric juice. Describe any three points to justify this statement.

  • 3)

    What would happen if for some reason goblet cells become non-functional. Why are these important for digestive system?

  • 4)

    Which part of the alimentary canal produce local digestive hormones? What would happen if these hormones are not produced?

  • 5)

    Out of the parts labelled as A, B, C and D of alimentary canal in the diagram below.Where is the enzyme responsible for the first stage of protein digestion produced?Label all parts, i.e., A-D.

CBSE 11th Standard Biology Subject Digestion and Absorption HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    'Digestion of starch starts in the buccal cavity, but stops in the stomach'. Comment

  • 2)

    Where does the absorption of drugs start in human alimentary canal?

  • 3)

    Why is the egestion process of food necessary?

  • 4)

    HCI is a strong acid. Yet it does not corrode the walls of the stomach. Why?

  • 5)

    Mention the importance of chemical analysis of liver in postmortem.

CBSE 11th Standard Biology Subject Digestion and Absorption HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    It is absolutely not necessary to produce amylase in an inactive form in our body, but it is not so, in the case of trypsin. Give reason.

  • 2)

    How would it affect the digestion of fats and carbohydrates, if there is a blockage in the pancreatic duct? Explain.

  • 3)

    Where does the absorption of drugs start in human alimentary canal?

  • 4)

    Why is the egestion process of food necessary?

  • 5)

    HCI is a strong acid. Yet it does not corrode the walls of the stomach. Why?

CBSE 11th Standard Biology Subject Digestion and Absorption HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Name the mechanism by which nutrients are absorbed in alimentary canal

  • 2)

    If a person is suffering from reflux oesophagitis, which part of his alimentary canal is not functioning properly.

  • 3)

    HCI is secreted in stomach. Give the name of the cells that secrete it.

  • 4)

    What is the reason behind the large size of caecum (portion of large intestine) in certain herbivores?

  • 5)

    Mention the important functioning of peristalsis movement that occurs throughout the alimentary canal.

CBSE 11th Standard Biology Subject Digestion and Absorption HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Name the mechanism by which nutrients are absorbed in alimentary canal

  • 2)

    If a person is suffering from reflux oesophagitis, which part of his alimentary canal is not functioning properly.

  • 3)

    HCI is secreted in stomach. Give the name of the cells that secrete it.

  • 4)

    What is the reason behind the large size of caecum (portion of large intestine) in certain herbivores?

  • 5)

    Mention the important functioning of peristalsis movement that occurs throughout the alimentary canal.

CBSE 11th Standard Biology Subject Plant Growth and Development HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In a slide showing different types of cells, can you identify which type of the cell may be meristematic and the one which is incapable of dividing and how?

  • 2)

    How does spraying of sugarcane plants with gibberellins increase the yield of sugar?

  • 3)

    How do IBA and 2, 4-D are used in agriculture?

  • 4)

    Explain what is meant by the terms auxin precursors, anti-auxins, free auxins and bound auxins

  • 5)

    Why do cut leaves dipped in cytokinins stay green for longer duration?

CBSE 11th Standard Biology Subject Plant Growth and Development HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In a slide showing different types of cells, can you identify which type of the cell may be meristematic and the one which is incapable of dividing and how?

  • 2)

    How does spraying of sugarcane plants with gibberellins increase the yield of sugar?

  • 3)

    How do IBA and 2, 4-D are used in agriculture?

  • 4)

    Explain what is meant by the terms auxin precursors, anti-auxins, free auxins and bound auxins

  • 5)

    Why do cut leaves dipped in cytokinins stay green for longer duration?

CBSE 11th Standard Biology Subject Respiration in Plants HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    When does anaerobic respiration occur in man and yeast?

  • 2)

    Comment on the statement,' Respiration is an energy producing process,but ATP is being used in some steps of the process'

  • 3)

    Why less energy is produced during anaerobic respiration?

  • 4)

    What is the importance of FoF1 particles in ATP production during aerobic respiration?

  • 5)

    Define respiratory quotient and mention the value for the proteins and fats.

CBSE 11th Standard Biology Subject Respiration in Plants HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    When does anaerobic respiration occur in man and yeast?

  • 2)

    Comment on the statement,' Respiration is an energy producing process,but ATP is being used in some steps of the process'

  • 3)

    Which amongst the following are 3 and 6 carbon compound?
    Oxaloacetate, phosphoglyceraldehyde, isocitrate, \(\alpha \)-ketoglutarate

  • 4)

    Why less energy is produced during anaerobic respiration?

  • 5)

    What is the importance of FoF1 particles in ATP production during aerobic respiration?

CBSE 11th Standard Biology Subject Respiration in Plants HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why does anaerobic respiration/fermentation yields less energy than aerobic respiration?

  • 2)

    Mention the step of citric acid cycle, which is not mediated by dehydrogeneous enzyme.

  • 3)

    Name the unit of oxidative phosphorylation.

  • 4)

    Mention the number of protons that passes through complex V for the synthesis of 2 molecules of ATP.

  • 5)

    Name the inhibitor of oxidative phosphorylation

CBSE 11th Standard Biology Subject Respiration in Plants HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why does anaerobic respiration/fermentation yields less energy than aerobic respiration?

  • 2)

    Mention the step of citric acid cycle, which is not mediated by dehydrogeneous enzyme.

  • 3)

    Name the unit of oxidative phosphorylation.

  • 4)

    Mention the number of protons that passes through complex V for the synthesis of 2 molecules of ATP.

  • 5)

    Name the inhibitor of oxidative phosphorylation

CBSE 11th Standard Biology Subject Photosynthesis in Higher Plants HOT Questions 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Cyclic photophosphorylation results in the production of ATPs and not NADPH. Give reasons.

  • 2)

    Two groups (A and B) or bean plants of similar size and same leaf area were placed in identical conditions. Group A was exposed to light of wavelength 400-450 nm Group B to the light of wavelength of 500-550 nm.Compare the photosynthesis rate of two groups by giving reason.

  • 3)

    In what kind of plants do you come across Kranz anatomy? To which conditions are those plants better adapted? How are these plants better adapted than the plants, which lack this anatomy?

  • 4)

    Give reasons for the following.
    (i) Plants are the lungs of nature.
    (ii) Chlorophyll-b and other accessory pigments are necessary for photosynthesis.
    (iii) In the high light intensities, the chlorophyll-a gets damaged.

  • 5)

    Explain the reasons of following.
    (i) Photosynthesis can occur in the absence of light.
    (ii) Even non-green leaves can make the food.
    (iii) Photosynthesis can occur under water.

CBSE 11th Standard Biology Subject Photosynthesis in Higher Plants HOT Questions 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Cyclic photophosphorylation results in the production of ATPs and not NADPH. Give reasons.

  • 2)

    Two groups (A and B) or bean plants of similar size and same leaf area were placed in identical conditions. Group A was exposed to light of wavelength 400-450 nm Group B to the light of wavelength of 500-550 nm.Compare the photosynthesis rate of two groups by giving reason.

  • 3)

    In what kind of plants do you come across Kranz anatomy? To which conditions are those plants better adapted? How are these plants better adapted than the plants, which lack this anatomy?

  • 4)

    Give reasons for the following.
    (i) Plants are the lungs of nature.
    (ii) Chlorophyll-b and other accessory pigments are necessary for photosynthesis.
    (iii) In the high light intensities, the chlorophyll-a gets damaged.

  • 5)

    Explain the reasons of following.
    (i) Photosynthesis can occur in the absence of light.
    (ii) Even non-green leaves can make the food.
    (iii) Photosynthesis can occur under water.

CBSE 11th Standard Biology Subject Photosynthesis in Higher Plants HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why is the lumen of thylakoids acidic while, the stroma is alkaline in nature?

  • 2)

    Dark reactions are dependent on light yet are called dark reactions. Justify.

  • 3)

    How does water stress affect/decrease the rate of photosynthesis

  • 4)

    Tomatoes, carrots and chillies are red in colour due to the presence of one pigment? Is it a photosynthetic pigment?---M---G1---

  • 5)

    Which property of the pigment is responsible for its ability to initiate the process of photosynthesis? Why is the rate of photosynthesis higher in the red and blue region of ? spectrum of light?

CBSE 11th Standard Biology Subject Photosynthesis in Higher Plants HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why is the lumen of thylakoids acidic while, the stroma is alkaline in nature?

  • 2)

    Dark reactions are dependent on light yet are called dark reactions. Justify.

  • 3)

    How does water stress affect/decrease the rate of photosynthesis

  • 4)

    Tomatoes, carrots and chillies are red in colour due to the presence of one pigment? Is it a photosynthetic pigment?---M---G1---

  • 5)

    Which property of the pigment is responsible for its ability to initiate the process of photosynthesis? Why is the rate of photosynthesis higher in the red and blue region of ? spectrum of light?

CBSE 11th Standard Biology Subject Photosynthesis in Higher Plants HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Where do the electrons move from the electron acceptor of PS-II in the Z-Scheme.

  • 2)

    Whose hypothesis revealed that plant purifies air while breathing animals and burning candles fouls it?

  • 3)

    Tomatoes, carrots and chillies are red in colour due to presence of one pigment. Name the pigment.It is a photosynthetic pigment?

  • 4)

    What would happen to the rate of photosynthesis in C3-plants if CO2 concentration level almost doubles from its present level in the atmosphere?

  • 5)

    Why is photorespiration called as the C2 cycle?

CBSE 11th Standard Biology Subject Photosynthesis in Higher Plants HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Where do the electrons move from the electron acceptor of PS-II in the Z-Scheme.

  • 2)

    Whose hypothesis revealed that plant purifies air while breathing animals and burning candles fouls it?

  • 3)

    Tomatoes, carrots and chillies are red in colour due to presence of one pigment. Name the pigment.It is a photosynthetic pigment?

  • 4)

    What would happen to the rate of photosynthesis in C3-plants if CO2 concentration level almost doubles from its present level in the atmosphere?

  • 5)

    Why is photorespiration called as the C2 cycle?

CBSE 11th Standard Biology Subject Chemical Coordination and Integration HOT Questions 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    How does progesterone function in a human female?

  • 2)

    George comes on a vacation to India from US. The long journey disturbs his biological clock and he suffers from jet lag. What is the cause of his discomfort?

  • 3)

    How does parathyroid hormone influences calcium uptake in the body?

  • 4)

    Name the two hormone of hypothalamus that influences’ the middle lobe of pituitary. Mention their functions.

  • 5)

    (i) What is termed as first messenger and second messenger in the target cells.
    (ii) How do protein hormones act on target cells?

CBSE 11th Standard Biology Subject Chemical Coordination and Integration HOT Questions 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    How does progesterone function in a human female?

  • 2)

    George comes on a vacation to India from US. The long journey disturbs his biological clock and he suffers from jet lag. What is the cause of his discomfort?

  • 3)

    How does parathyroid hormone influences calcium uptake in the body?

  • 4)

    Name the two hormone of hypothalamus that influences’ the middle lobe of pituitary. Mention their functions.

  • 5)

    (i) What is termed as first messenger and second messenger in the target cells.
    (ii) How do protein hormones act on target cells?

CBSE 11th Standard Biology Subject Chemical Coordination and Integration HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Mention the name given to the hormones produced by some non-endocrine tissues.

  • 2)

    The outermost layer of adrenal cortex is responsible for secretion of which hormone? identify

  • 3)

    Why is oxytocin called as birth hormone?

  • 4)

    What will happen if thyroxin is injected into a tadpole of frog?

  • 5)

    Why does the effect of noradrenalin last longer?

CBSE 11th Standard Biology Subject Chemical Coordination and Integration HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Mention the name given to the hormones produced by some non-endocrine tissues.

  • 2)

    The outermost layer of adrenal cortex is responsible for secretion of which hormone? identify

  • 3)

    Why is oxytocin called as birth hormone?

  • 4)

    What will happen if thyroxin is injected into a tadpole of frog?

  • 5)

    Why does the effect of noradrenalin last longer?

CBSE 11th Standard Biology Subject Neural Control and Coordination HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    How do the ionic gradients across the resting membrance can be maintained?

  • 2)

    Write a short note on neural coordination.

  • 3)

    Explain the significance of saltatory conduction.

  • 4)

    Why does synapse act as a one-way valve?

  • 5)

    Describe the functions of limbic system?

CBSE 11th Standard Biology Subject Neural Control and Coordination HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Write a short note on neural coordination.

  • 2)

    Explain the significance of saltatory conduction.

  • 3)

    Why does synapse act as a one-way valve?

  • 4)

    Describe the functions of limbic system?

  • 5)

    Write short notes on the following
    (i) Cochlea
    (ii) Organ of Corti

CBSE 11th Standard Biology Subject Neural Control and Coordination HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Which is the bluish (pigmented) layer present beneath the sclera?

  • 2)

    How do the efferent fibres work?

  • 3)

    How does the somatic nervous system work?

  • 4)

    Which is the largest and most complex of all the parts of the human brain?

  • 5)

    The autonomic nervous system is considered as involuntary nervous system. Why?

CBSE 11th Standard Biology Subject Neural Control and Coordination HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Which is the bluish (pigmented) layer present beneath the sclera?

  • 2)

    How do the efferent fibres work?

  • 3)

    How does the somatic nervous system work?

  • 4)

    Which is the largest and most complex of all the parts of the human brain?

  • 5)

    The autonomic nervous system is considered as involuntary nervous system. Why?

CBSE 11th Standard Biology Subject Mineral Nutrition HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    The technique of solution culture has been developed to avoid contamination.Justify.How?

  • 2)

    With holding of any one nutrient in plant may cause one or another type of deficiency in case of plants.Discuss.

  • 3)

    It is observed that deficiency of a particular element showed its symptoms initially in older leaves and than younger leaves.
    a) Does it indicate that the element is actively mobilized or relatively immobile?
    b) Name two elements which are highly mobile and two which are relatively immobile.
    c) How is the aspect of mobility of elements important to horticulture and agriculture?

  • 4)

    How are plants grown in glass containers to judge essential elements?

  • 5)

    A farmer adds azotobacter culture to the soil before sowing maize. How does it increase the yield of maize?

CBSE 11th Standard Biology Subject Mineral Nutrition HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    The technique of solution culture has been developed to avoid contamination.Justify.How?

  • 2)

    With holding of any one nutrient in plant may cause one or another type of deficiency in case of plants.Discuss.

  • 3)

    It is observed that deficiency of a particular element showed its symptoms initially in older leaves and than younger leaves.
    a) Does it indicate that the element is actively mobilized or relatively immobile?
    b) Name two elements which are highly mobile and two which are relatively immobile.
    c) How is the aspect of mobility of elements important to horticulture and agriculture?

  • 4)

    How are plants grown in glass containers to judge essential elements?

  • 5)

    A farmer adds azotobacter culture to the soil before sowing maize. How does it increase the yield of maize?

CBSE 11th Standard Biology Subject Transport in Plants HOT Questions 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Well-watered plants transpire more during sunny and windy days than in cool and calm mornings. Comment.

  • 2)

    Photosynthesis needs constant supply of water. But transpiration can hamper this supply. How do plants of desert area manage to get sufficient water in spite of faster transpiration?

  • 3)

    How does the absorption and loss of potassium ions in the guard cells bring about the opening and closing of stomata?

  • 4)

    What are the two types of interaction of water molecules that allow water to travel upwards in the plants? What other physical process aids in water transport to the top of the trees? Explain.

  • 5)

    Organic substances are translocated in upward and downward directions through phloem. Answer the following
    (i) What is the effect of blocking the phloem?
    (ii) What do you find in chemical analysis of phloem sap?

CBSE 11th Standard Biology Subject Transport in Plants HOT Questions 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Well-watered plants transpire more during sunny and windy days than in cool and calm mornings. Comment.

  • 2)

    Photosynthesis needs constant supply of water. But transpiration can hamper this supply. How do plants of desert area manage to get sufficient water in spite of faster transpiration?

  • 3)

    How does the absorption and loss of potassium ions in the guard cells bring about the opening and closing of stomata?

  • 4)

    What are the two types of interaction of water molecules that allow water to travel upwards in the plants? What other physical process aids in water transport to the top of the trees? Explain.

  • 5)

    Organic substances are translocated in upward and downward directions through phloem. Answer the following
    (i) What is the effect of blocking the phloem?
    (ii) What do you find in chemical analysis of phloem sap?

CBSE 11th Standard Biology Subject Transport in Plants HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    It is rightly said that development of root pressure requires energy.Justify.

  • 2)

    It is said that plants are harmed by excess water. But they are able to survive under flooded condition. discuss the way in which plants manage the amount of excess water?

  • 3)

    If a plant is girdled, which part of the plant dies first- the root or the shoot? Answer the giving reasons.

  • 4)

    if fifty per cent of the leaves are removed from a plant, the rate of transpiration by the remaining leaves increase. Explain.

  • 5)

    It is seen that number of stomata are greater on the lower surface of the leaf than the upper surface. Why is it so?

CBSE 11th Standard Biology Subject Transport in Plants HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    When separated by a semipermeable membrane, water enters the sugar solution. What would you call the sugar solution? Osmotically active or inactive?

  • 2)

    If one wants to find minerals in the form they are mobilised in the plant, how will the analysis of the exudate helps?

  • 3)

    It is rightly said that development of root pressure requires energy.Justify.

  • 4)

    It is said that plants are harmed by excess water. But they are able to survive under flooded condition. discuss the way in which plants manage the amount of excess water?

  • 5)

    If a plant is girdled, which part of the plant dies first- the root or the shoot? Answer the giving reasons.

CBSE 11th Standard Biology Subject Transport in Plants HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    A gardener forgot to water a potted for a day during summer, what will happen to the plant? Do you think it reversible? If yes, how?

  • 2)

    Is there any involvement of osmosis in the apoplast pathway? Yes or no? If no give reason.

  • 3)

    Water moves up against gravity and even for a tree of 20m height, the tip receives water within two hours.The most important physiological phenomenon, Which is responsible for the upward movement of water is ________________.

  • 4)

    Root pressure cannot account for the translocation of water.True or false?Explain.

  • 5)

    A plant if transpiring rapidly, will it show root pressure also?

CBSE 11th Standard Biology Subject Transport in Plants HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    A gardener forgot to water a potted for a day during summer, what will happen to the plant? Do you think it reversible? If yes, how?

  • 2)

    Is there any involvement of osmosis in the apoplast pathway? Yes or no? If no give reason.

  • 3)

    Water moves up against gravity and even for a tree of 20m height, the tip receives water within two hours.The most important physiological phenomenon, Which is responsible for the upward movement of water is ________________.

  • 4)

    Root pressure cannot account for the translocation of water.True or false?Explain.

  • 5)

    A plant if transpiring rapidly, will it show root pressure also?

CBSE 11th Standard Biology Subject Cell Cycle and Cell Division HOT Questions 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What is the need of meiosis in cell division?

  • 2)

    Meiosis is advantageous than mitosis as it produces variations so plays important role in evolution. What are the stages during which chances of recombination of genes are increased during meiosis? Explain these events.

  • 3)

    How does cytokinesis in plant cells differ from that in animal cells?

  • 4)

    How does meiosis facilitate creation of off springs, with distinct characters?

  • 5)

    (i) Why is mitosis also known as an equational division?
    (ii) You are viewing a dividing cell under a microscope. How can you determine whether it is an animal cell or a plant cell?

CBSE 11th Standard Biology Subject Cell Cycle and Cell Division HOT Questions 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What is the need of meiosis in cell division?

  • 2)

    Meiosis is advantageous than mitosis as it produces variations so plays important role in evolution. What are the stages during which chances of recombination of genes are increased during meiosis? Explain these events.

  • 3)

    How does cytokinesis in plant cells differ from that in animal cells?

  • 4)

    How does meiosis facilitate creation of off springs, with distinct characters?

  • 5)

    (i) Why is mitosis also known as an equational division?
    (ii) You are viewing a dividing cell under a microscope. How can you determine whether it is an animal cell or a plant cell?

CBSE 11th Standard Biology Subject Cell Cycle and Cell Division HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Substance W is a chemical that inhibits spindle formation during cell division. If a meristematic plant cell were exposed to substance W, which process will not be able to occur in that plant cell?

  • 2)

    The second meiotic division is similar to mitosis as it results in the separation as it results in the separation of the sister chromatids. However, it also differs from mitosis. Explain how?

  • 3)

    How would you analyse that the cell's entire energy is devoted to the process of division in the M-phase?

  • 4)

    Colchicine is known to be the mitotic poison. How?

  • 5)

    While examining mitotic stage in a tissue. One finds some cells with 16 chromosomes and some with 32 chromosomes. What possible reasons could you assign to this difference in chromosome number? Do you think that cells with 16 chromosomes number could have arisen from cells with 32 chromosomes or vice-versa?

CBSE 11th Standard Biology Subject Cell Cycle and Cell Division HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Substance W is a chemical that inhibits spindle formation during cell division. If a meristematic plant cell were exposed to substance W, which process will not be able to occur in that plant cell?

  • 2)

    The second meiotic division is similar to mitosis as it results in the separation as it results in the separation of the sister chromatids. However, it also differs from mitosis. Explain how?

  • 3)

    How would you analyse that the cell's entire energy is devoted to the process of division in the M-phase?

  • 4)

    Colchicine is known to be the mitotic poison. How?

  • 5)

    The following statements describe the four main stages in the process of mitosis.
    I. The spindle fibers breakdown and the nuclear membrane forms.
    II. The chromosomes arrange themselves on the equator of the cell.
    III. The spindle forms and the nuclear membrane disintegrates.
    IV. The centromere splits and the sister chromatids migrate to the opposite poles of the cell.
    Write the correct sequence of the stages in mitosis and also name the each stage.

CBSE 11th Standard Biology Subject Cell Cycle and Cell Division HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    During which phase of mitotic cell division, chromosomes get separated?

  • 2)

    It is said that one cell cycle of cell division in human cells (eukaryotic cells) takes 24 hours. Which phase of the cycle, do you think occupies the maximum part of the cell cycle.

  • 3)

    If a tissue has 1024 cells at a given time, how many cycles of mitosis had the original parental single cell undergone?

  • 4)

    Can there be mitosis without DNA replication in ‘S’ phase?

  • 5)

    At what stage of meiosis, formation of tetrads occurs.Name it.

CBSE 11th Standard Biology Subject Cell Cycle and Cell Division HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    During which phase of mitotic cell division, chromosomes get separated?

  • 2)

    It is said that one cell cycle of cell division in human cells (eukaryotic cells) takes 24 hours. Which phase of the cycle, do you think occupies the maximum part of the cell cycle.

  • 3)

    If a tissue has 1024 cells at a given time, how many cycles of mitosis had the original parental single cell undergone?

  • 4)

    Can there be mitosis without DNA replication in ‘S’ phase?

  • 5)

    At what stage of meiosis, formation of tetrads occurs.Name it.

CBSE 11th Standard Biology Subject Biomolecules HOT Questions 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Succinic dehydrogenase is an enzyme that causes the substrate, succinate, to break down into fumarate
    Malonate is a substance that resembles succinate and inhibits the activity of succinic dehydrogenase
    (i) State the type of inhibition of succinic dehydrogenase by malonate
    (ii) Explain how this type of inhibition affects the activity of the enzyme

  • 2)

    Succinic dehydrogenase is an enzyme that causes the substrate, succinate, to break down into fumarate
    Malonate is a substance that resembles succinate and inhibits the activity of succinic dehydrogenase
    Explain how this type of inhibition affects the activity of the enzyme

  • 3)

    Proteins have primary structure. If you are given a method to know which amino acid is at either of the two termini (ends) of a protein, can you connect this information to purity or homogeneity of a protein?

  • 4)

    Living state and metabolisms are synonyms. Justify.

  • 5)

    (i) Name the category to fats belong?
    (ii) What is cholesterol?
    (iii) What are the two forms of cholesterol?

CBSE 11th Standard Biology Subject Biomolecules HOT Questions 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Proteins have primary structure. If you are given a method to know which amino acid is at either of the two termini (ends) of a protein, can you connect this information to purity or homogeneity of a protein?

  • 2)

    Without metabolism, the living state can not exist Justify.

  • 3)

    Enzymes are proteins. Proteins are long chains of amino acids linked to each other by peptide bonds. Amino acids have many functional groups in their structure.
    These functional groups are ionizable as they are weak acids and bases in chemical nature. This ionisation is influenced by the pH of the solution. For many enzymes, activity is influenced by surrounding pH. This is depicted in the curve given explain briefly.

  • 4)

    The lines A to D below show how change in temperature can affect the rate of enzyme reaction.Line N shows the rate of reaction under optimum temperature.

    Which line A, B, C or D shows the rate of enzyme reaction at \(60°C\)?

  • 5)

    (i) Name the category to fats belong?
    (ii) What is cholesterol?
    (iii) What are the two forms of cholesterol?

CBSE 11th Standard Biology Subject Biomolecules HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Account for the following. Phospholipids form a thin layer on the surface of an aqueous medium.

  • 2)

    Identify the lipid molecule that is crystallisable in nature. Also, give the name of the disorder produced by it in the human body.

  • 3)

    Why do doctors recommend vegetable oils with polyunsaturated fatty acids for persons suffering from cardiovascular disease?

  • 4)

    Amino acids are substituted methanes. Justify why are they called \(\alpha -\) amino acids?

  • 5)

    Nucleotides are phosphorylated nucleosides. Justify.

CBSE 11th Standard Biology Subject Biomolecules HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Account for the following. Phospholipids form a thin layer on the surface of an aqueous medium.

  • 2)

    Identify the lipid molecule that is crystallisable in nature. Also, give the name of the disorder produced by it in the human body.

  • 3)

    Why do doctors recommend vegetable oils with polyunsaturated fatty acids for persons suffering from cardiovascular disease?

  • 4)

    Nucleotides are phosphorylated nucleosides. Justify.

  • 5)

    What would happen when salivary amylase that acts specifically on starch enters the stomach and mixes with gastric juice

CBSE 11th Standard Biology Subject Biomolecules HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    The enzyme that work only in presence of a cofactor or coenzyme is called

  • 2)

    Pepsin is an intracellular or extracellular enzyme. Which is correct?

  • 3)

    The enzymes activity gets destroyed on increasing high temperature.What happens during that state that enzyme looses its activity?

  • 4)

    Name the basic unit of chitin.

  • 5)

    Why does starch turn blue black with iodine?

CBSE 11th Standard Biology Subject Biomolecules HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Pepsin is an intracellular or extracellular enzyme. Which is correct?

  • 2)

    The enzymes activity gets destroyed on increasing high temperature.What happens during that state that enzyme looses its activity?

  • 3)

    Name the basic unit of chitin.

  • 4)

    Why does starch turn blue black with iodine?

  • 5)

    Name one element invariably found in proteins, but not in all carbohydrates and lipids.

CBSE 11th Standard Biology Subject Cell - The Unit of Life HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What is the difference between animal and bacterial cells with respect to the presence of nucleus?

  • 2)

    Which cell organelles are referred to as suicide bags?Why are they given this name?

  • 3)

    Multicellular organisms have division of labour. Explain.

  • 4)

    Which four different sites in plant cells have ribosomes?

  • 5)

    (i) Name two surface extensions that are not concerned with motility in bacterial cells.
    (ii) Give the name of the structure that helps in motility of bacterial cells.

CBSE 11th Standard Biology Subject Cell - The Unit of Life HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What is the difference between animal and bacterial cells with respect to the presence of nucleus?

  • 2)

    Which cell organelles are referred to as suicide bags?Why are they given this name?

  • 3)

    Multicellular organisms have division of labour. Explain.

  • 4)

    Which four different sites in plant cells have ribosomes?

  • 5)

    (i) Name two surface extensions that are not concerned with motility in bacterial cells.
    (ii) Give the name of the structure that helps in motility of bacterial cells.

CBSE 11th Standard Biology Subject Structural Organisation in Animals HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why the scientists decalcify the bones?

  • 2)

    What is the unique feature of cardiac muscles?

  • 3)

    Cardiac muscle tissues have both character of skeletal and smooth muscles, how? Explain.

  • 4)

    Malphigian tubules are proto structure of nephron. How?

  • 5)

    Differentiate between male and female cockroach.

CBSE 11th Standard Biology Subject Structural Organisation in Animals HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why the scientists decalcify the bones?

  • 2)

    What is the unique feature of cardiac muscles?

  • 3)

    Cardiac muscle tissues have both character of skeletal and smooth muscles, how? Explain.

  • 4)

    Malphigian tubules are proto structure of nephron. How?

  • 5)

    Differentiate between male and female cockroach.

CBSE 11th Standard Biology Subject Structural Organisation in Animals HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Justify the name pseudo stratified epithelium

  • 2)

    Why the bone is the hardest tissue in the body?

  • 3)

    Plasma protein acts as acid-base buffer in the blood . Explain

  • 4)

    Why neutrophils are called phagocytic cells?

  • 5)

    Why the alimentary canal of frog is short?

CBSE 11th Standard Biology Subject Structural Organisation in Animals HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What is the property of glandular epthelium ?

  • 2)

    Justify the name pseudo stratified epithelium

  • 3)

    Why the bone is the hardest tissue in the body?

  • 4)

    Plasma protein acts as acid-base buffer in the blood . Explain

  • 5)

    How does earthworm spoll the playgrounds?

CBSE 11th Standard Biology Subject Anatomy of Flowering Plants HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    How the secondary growth in dicot stems is achieved?

  • 2)

    Certain epidermal adaxial cells along the midrib modify themselves to large , empty, colurless cells.Name these

  • 3)

    Why is root's apical meristem is subterminal?

  • 4)

    Why xylem vessels are called syncytes?

  • 5)

    How do the bulliform cells present in the epidermis help grasses?

CBSE 11th Standard Biology Subject Anatomy of Flowering Plants HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why the heartwood's colour is dark?

  • 2)

    Certain epidermal adaxial cells along the midrib modify themselves to large , empty, colurless cells.Name these

  • 3)

    Why is root's apical meristem is subterminal?

  • 4)

    Why xylem vessels are called syncytes?

  • 5)

    How do the bulliform cells present in the epidermis help grasses?

CBSE 11th Standard Biology Subject Morphology of Flowering Plants HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why some tap roots become swollen and fleshy?

  • 2)

    Why development of root branches is endogenous?

  • 3)

    Why are velamen tissues present in epiphytic roots?

  • 4)

    Why insects attract towards pitcher plants?

  • 5)

    Why the leaves of Aloe and Agave store water?

CBSE 11th Standard Biology Subject Morphology of Flowering Plants HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why are velamen tissues present in epiphytic roots?

  • 2)

    Why insects attract towards pitcher plants?

  • 3)

    Why the leaves of Aloe and Agave store water?

  • 4)

    A maize grain is not a seed.Explain

  • 5)

    How superior and inferior ovaries are indicated by symbol?

CBSE 11th Standard Biology Subject Animal Kingdom HOT Questions 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why molluscs are considered advanced over annelids?

  • 2)

    Justify that annelids are evolutionary precursors of molluscs.

  • 3)

    Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?

  • 4)

    How many species are present in class Amphibia?Make a list of its members.What may be the reason that they are partially successful although they can also live on land?

  • 5)

    On a morning walk with your friend you came across an animal which looks like a snake. But on watching it closely, your friend says it is an earthworm. What helped him in identifying it as an earthworm?

CBSE 11th Standard Biology Subject Animal Kingdom HOT Questions 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    How is cephalisation considered as an asset in an adjustment with the environment?

  • 2)

    Why the blood vascular system of leeches is also called the haemocoelomic system? Write its details.

  • 3)

    Why molluscs are considered advanced over annelids?

  • 4)

    Justify that annelids are evolutionary precursors of molluscs.

  • 5)

    Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?

CBSE 11th Standard Biology Subject Animal Kingdom HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In which groups animals, closed circulatory system is found? Why blood flows with faster speed and high pressure in these animals?

  • 2)

    Sponges are filter feeders.How does it take place?

  • 3)

    Why Peripatus is called a connecting link between annelids and arthropods?

  • 4)

    How are canals in canal system connect spongocoel to the outside?What is the role of choanocytes in maintaining water flow?

  • 5)

    Fill up the blank spaces appropriately.

    Phylum Excretory organ Circulatory organ Respiratory organ
    Arthropoda a b trachea
    c Nephridia closed skin
    vertebrate  d closed  lung

CBSE 11th Standard Biology Subject Animal Kingdom HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In which groups animals, closed circulatory system is found? Why blood flows with faster speed and high pressure in these animals?

  • 2)

    Sponges are filter feeders.How does it take place?

  • 3)

    How will you differentiate between the heart of an amphibian and a reptile?

  • 4)

    Justify 'snakes have a strong sense of smell'.

  • 5)

    Endoparasites are found inside the host body. Mention the special structures possessed by these to enable them to survive in those conditions.

CBSE 11th Standard Biology Subject Animal Kingdom HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why digestive tract of flatworms and coelenterates is called incomplete?

  • 2)

    Give example of two unisexual animals

  • 3)

    What is pseudo segmentation?

  • 4)

    What is the difference in blood of annelids and of vertebrates?

  • 5)

    Why is lateral line sensory system present in Pisces?

CBSE 11th Standard Biology Subject Animal Kingdom HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why is lateral line sensory system present in Pisces?

  • 2)

    Why the heart of fishes is commonly called 'the venous heart'?

  • 3)

    Why the caudal fin in bony fishes is called as homocercal type?

  • 4)

    Birds have no teeth, then how do they grind the grains they eat as food?

  • 5)

    Why pneumatic bones are present in birds?

CBSE 11th Standard Biology Subject Plant Kingdom HOT Questions 5 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What role does vascular plants play in keeping the earth green? Which features help them to dominate the earth?

  • 2)

    Why is Ginkgo Biloba called a living fossil? Explain how is it useful for horticulturists. What are its important features? Why horticulturists prefer to grow only male plants?

  • 3)

    Describe classification of algae. Write main characters of every group in detail.

  • 4)

    Describe major features of Plant Kingdom.

  • 5)

    Describe the economic importance of seedless vascular plants as
    (i) Food source
    (ii) Soil erosion
    (iii) Biofertiliser
    (iv) Drugs
    (v) Ornamental plants.

CBSE 11th Standard Biology Subject Plant Kingdom HOT Questions 5 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What role does vascular plants play in keeping the earth green? Which features help them to dominate the earth?

  • 2)

    How is natural system different from artificial system of classification? List some features.

  • 3)

    Why is Ginkgo Biloba called a living fossil? Explain how is it useful for horticulturists. What are its important features? Why horticulturists prefer to grow only male plants?

  • 4)

    Describe classification of algae. Write main characters of every group in detail.

  • 5)

    Describe the economic importance of seedless vascular plants as
    (i) Food source
    (ii) Soil erosion
    (iii) Biofertiliser
    (iv) Drugs
    (v) Ornamental plants.

CBSE 11th Standard Biology Subject Plant Kingdom HOT Questions 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Describe the type of photosynthetic pigment in red algae,green algae and brown algae.

  • 2)

    Why the vascular plants dominated land?

  • 3)

    Each plant or group of plants have some phylogenetic significance in relation to evolution. Cycas with any of the few living members of gymnosperms is called as 'relic of the past'. can you establish a phylogenetic relationship of Cycas with any other of plants that justifies the above statement?

  • 4)

    What is the advantage of the development of seed habits in seed plants?

  • 5)

    What are the main differences among Chlorophyceae, Phaeophyceae and Rhodophyceae?

CBSE 11th Standard Biology Subject Plant Kingdom HOT Questions 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Describe the type of photosynthetic pigment in red algae,green algae and brown algae.

  • 2)

    Why the vascular plants dominated land?

  • 3)

    Each plant or group of plants have some phylogenetic significance in relation to evolution. Cycas with any of the few living members of gymnosperms is called as 'relic of the past'. can you establish a phylogenetic relationship of Cycas with any other of plants that justifies the above statement?

  • 4)

    What is the advantage of the development of seed habits in seed plants?

  • 5)

    What are the main differences among Chlorophyceae, Phaeophyceae and Rhodophyceae?

CBSE 11th Standard Biology Subject Plant Kingdom HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    On which criteria is chemotaxonomy based ?Can it be used for classification?

  • 2)

    Natural system of classification is considered better than artifiicial system of classification. Explain.

  • 3)

    On the basis of which three features, Selaginella shows traits of seed habit?

  • 4)

    To which class of Bryophyta Anthoceros belong? Why is it called a hornwort?

  • 5)

    Vasular tissues are not present in bryophytes. Then how the conduction of water and food takes place?

CBSE 11th Standard Biology Subject Plant Kingdom HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What was the drawback of artificial system of classification?

  • 2)

    On which criteria is chemotaxonomy based ?Can it be used for classification?

  • 3)

    To which class of Bryophyta Anthoceros belong? Why is it called a hornwort?

  • 4)

    Vasular tissues are not present in bryophytes. Then how the conduction of water and food takes place?

  • 5)

    Why are bryophytes called as 'amphibians of plant kingdom'?

CBSE 11th Standard Biology Subject Plant Kingdom HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why the artificial system of classification was not considered reliable by the taxonomists?

  • 2)

    Which system indicates evolutionarily as well as genetic relationships among organisms?

  • 3)

    How does the natural system of classification provide detailed information about the groups?

  • 4)

    Which event in pteridophytes is considered an important step in the evolution of seed habit in plants?

  • 5)

    Why the name given double fertilisation to fertilisation in angiosperms?

CBSE 11th Standard Biology Subject Plant Kingdom HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why the artificial system of classification was not considered reliable by the taxonomists?

  • 2)

    Which system indicates evolutionarily as well as genetic relationships among organisms?

  • 3)

    How does the natural system of classification provide detailed information about the groups?

  • 4)

    Which event in pteridophytes is considered an important step in the evolution of seed habit in plants?

  • 5)

    Why the name given double fertilisation to fertilisation in angiosperms?

CBSE 11th Standard Biology Subject Biological Classification HOT Questions 5 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Biological classification is a dynamic and ever-evolving phenomenon which keeps changing with our understanding of life forms. Justify the statements by taking any two examples.

  • 2)

    (i) Why does the interior of bacterial cell appear simple and granular?
    (ii) Which components make cell envelope of bacterial cell?
    (iii) What gives gummy or sticky trait to bacterial cells and if it is not essential for survival, what are its functions?

  • 3)

    In which organisms heterocyst is present? Mention two features of heterocysts. Which features make it suitable for nitrogen-fixation?

  • 4)

    Name the following
    (i) A poisonous mushroom having white spores
    (ii) Edible Basidiomycetes
    (iii) Fungus used in brewing industry
    (iv) It is searched by trained pets
    (v) Root-like, cards-like hyphal masses having a distinct growing point.
    (vi) Non-motile meiospores develop in Basidiomycetes
    (vii) Compact groups of hyphae produced to overcome unfavourable conditions.

  • 5)

    Explain the following in terms of mycorrhizal association.
    (i) Growth promotion
    (ii) Antimicrobial substance
    (iii) Nourishment
    (iv) Adverse environment
    (v) Absorption of water

CBSE 11th Standard Biology Subject Biological Classification HOT Questions 5 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Biological classification is a dynamic and ever-evolving phenomenon which keeps changing with our understanding of life forms. Justify the statements by taking any two examples.

  • 2)

    (i) Why does the interior of bacterial cell appear simple and granular?
    (ii) Which components make cell envelope of bacterial cell?
    (iii) What gives gummy or sticky trait to bacterial cells and if it is not essential for survival, what are its functions?

  • 3)

    In which organisms heterocyst is present? Mention two features of heterocysts. Which features make it suitable for nitrogen-fixation?

  • 4)

    Name the following
    (i) A poisonous mushroom having white spores
    (ii) Edible Basidiomycetes
    (iii) Fungus used in brewing industry
    (iv) It is searched by trained pets
    (v) Root-like, cards-like hyphal masses having a distinct growing point.
    (vi) Non-motile meiospores develop in Basidiomycetes
    (vii) Compact groups of hyphae produced to overcome unfavourable conditions.

  • 5)

    Explain the following in terms of mycorrhizal association.
    (i) Growth promotion
    (ii) Antimicrobial substance
    (iii) Nourishment
    (iv) Adverse environment
    (v) Absorption of water

CBSE 11th Standard Biology Subject Biological Classification HOT Questions 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Define the term mycorrhiza. How are these associations affect a plant? Explain with examples

  • 2)

    When did cyanobacteria evolved? Why are they referred  as the earliest colonisers of barren areas?

  • 3)

    Justify the statement Euglena is a  taxonomic puzzle.

  • 4)

    Why the members of class-Deuteromycetes are considered the fungi imperfecti?

  • 5)

    There is a myth that immediately after heavy rains in forest, mushrooms appear in large number and make a very large ring or circle, which may be several metres in diameter. These are called 'fairy rings'. Can you explain the myth of fairy rings in biological terms?

CBSE 11th Standard Biology Subject Biological Classification HOT Questions 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Define the term mycorrhiza. How are these associations affect a plant? Explain with examples

  • 2)

    When did cyanobacteria evolved? Why are they referred  as the earliest colonisers of barren areas?

  • 3)

    Justify the statement Euglena is a  taxonomic puzzle.

  • 4)

    Why the members of class-Deuteromycetes are considered the fungi imperfecti?

  • 5)

    There is a myth that immediately after heavy rains in forest, mushrooms appear in large number and make a very large ring or circle, which may be several metres in diameter. These are called 'fairy rings'. Can you explain the myth of fairy rings in biological terms?

CBSE 11th Standard Biology Subject Biological Classification HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    How do fungi form partnership with most plants?

  • 2)

    Neurospora, an Ascomycetes fungus has been used as a biological tool to understand the mechanism of plant genetics much in the same way as Drosophila has been used to study animal genetics. What makes Neurospora as a genetic tool?

  • 3)

    What is the characteristic feature of class-Ascomycetes?

  • 4)

    Lichens play important role in biological succession and soil formation. Justify.

  • 5)

    Why do mosquito bites cause itching?

CBSE 11th Standard Biology Subject Biological Classification HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Which type of fungi are also called bracket fungi?

  • 2)

    How do fungi form partnership with most plants?

  • 3)

    Neurospora, an Ascomycetes fungus has been used as a biological tool to understand the mechanism of plant genetics much in the same way as Drosophila has been used to study animal genetics. What makes Neurospora as a genetic tool?

  • 4)

    What is the characteristic feature of class-Ascomycetes?

  • 5)

    Which protists show symbiotic relationship?How is this relation carried out?

CBSE 11th Standard Biology Subject Biological Classification HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why the pseudoparenchyma fungal tissue is called false parenchyma?

  • 2)

    Why lichens are called dual organisms?

  • 3)

    How are lichens related to air pollution?

  • 4)

    Virus cannot grow on non-living culture medium. Give reason

  • 5)

    Why two kingdom classification continued to be used for a long time?

CBSE 11th Standard Biology Subject Biological Classification HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    How the saprotrophic Basidiomycetes are able to decompose plant matter?

  • 2)

    Why the pseudoparenchyma fungal tissue is called false parenchyma?

  • 3)

    In which kingdom of five kingdom classification, nuclear membrane is not present?

  • 4)

    Mention any two cellular structures absent in kingdom-Animalia of four Kingdom classification system of organisms that are present in kingdom-Protista.

  • 5)

    Polluted water bodies have usually very high abundance of plants like Nostoc and Oscillatoria. Give reasons.

CBSE 11th Standard Biology Subject The Living World HOT Questions 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Metabolic reactions can be shown outside the body in cell-free systems experimentally.Why are cells required in living organisms?

  • 2)

    Amoeba is a living matter and a sand particle is non-living matter.Explain.

  • 3)

    Why reproduction is necessary? is it essential for survival? If a living organism does not reproduce, in which category it will belong, living or non-living? How is sexual reproduction different from asexual reproduction?

  • 4)

    Do you consider a person in coma, living or dead?

  • 5)

    In which conditions human beings are difficult to define as living?

CBSE 11th Standard Biology Subject The Living World HOT Questions 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What are the obligate categories? How these are different from intermediate categories. List out some intermediate categories.

  • 2)

    Amoeba is a living matter and a sand particle is non-living matter.Explain.

  • 3)

    Why reproduction is necessary? is it essential for survival? If a living organism does not reproduce, in which category it will belong, living or non-living? How is sexual reproduction different from asexual reproduction?

  • 4)

    Do you consider a person in coma, living or dead?

  • 5)

    In which conditions human beings are difficult to define as living?

CBSE 11th Standard Biology Subject The Living World HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    A plants may have different names in different regions of the country or world. How do botanists solve this problem?

  • 2)

    All the organisms are not yet identified on the earth.Justify the statement.

  • 3)

    What makes species a basic taxonomic category?

  • 4)

    Classify whole moong dal and brookenmoong dal into living nonliving in terms of growth and respiration?

  • 5)

    Latin names of plants and animals are difficult to pronounce and remember.Why do we then use them?

CBSE 11th Standard Biology Subject The Living World HOT Questions 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Reproduction cannot be the defining characteristic of living organisms.Justify.

  • 2)

    A plants may have different names in different regions of the country or world. How do botanists solve this problem?

  • 3)

    All the organisms are not yet identified on the earth.Justify the statement.

  • 4)

    What makes species a basic taxonomic category?

  • 5)

    Classify whole moong dal and brookenmoong dal into living nonliving in terms of growth and respiration?

CBSE 11th Standard Biology Subject The Living World HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Write the name of any two organisms that show fragmentation

  • 2)

    Can we relate metabolism with growth of the body?

  • 3)

    How is diversity in living world related to taxonomy?

  • 4)

    How correlated characters help in defining genus?

  • 5)

    Give an example of genus with a single species.

CBSE 11th Standard Biology Subject The Living World HOT Questions 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Can we relate metabolism with growth of the body?

  • 2)

    How is key helpful in identification of living organisms?

  • 3)

    How is diversity in living world related to taxonomy?

  • 4)

    How correlated characters help in defining genus?

  • 5)

    Give an example of genus with a single species.

CBSE 11th Standard Biology Subject HOT Questions 5 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Some of the properties of tissues are not the properties of constituents of its cells. Give three examples to support the statement.

  • 2)

    A student of taxonomy was puzzled when told by his professor to look for a key to identify a plant. He went to his friend to clarify what key the professor was referring to? What would the friend explain to him?

  • 3)

    (i) Why does the interior of bacterial cell appear simple and granular?
    (ii) Which components make cell envelope of bacterial cell?
    (iii) What gives gummy or sticky trait to bacterial cells and if it is not essential for survival, what are its functions?

  • 4)

    In which organisms heterocyst is present? Mention two features of heterocysts. Which features make it suitable for nitrogen-fixation?

  • 5)

    What role does vascular plants play in keeping the earth green? Which features help them to dominate the earth?

CBSE 11th Standard Biology Subject HOT Questions 5 Marks Questions 2021 Part - II - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Some of the properties of tissues are not the properties of constituents of its cells. Give three examples to support the statement.

  • 2)

    A student of taxonomy was puzzled when told by his professor to look for a key to identify a plant. He went to his friend to clarify what key the professor was referring to? What would the friend explain to him?

  • 3)

    Biological classification is a dynamic and ever-evolving phenomenon which keeps changing with our understanding of life forms. Justify the statements by taking any two examples.

  • 4)

    (i) Why does the interior of bacterial cell appear simple and granular?
    (ii) Which components make cell envelope of bacterial cell?
    (iii) What gives gummy or sticky trait to bacterial cells and if it is not essential for survival, what are its functions?

  • 5)

    In which organisms heterocyst is present? Mention two features of heterocysts. Which features make it suitable for nitrogen-fixation?

CBSE 11th Standard Biology Subject HOT Questions 5 Marks Questions 2021 Part - I - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Some of the properties of tissues are not the properties of constituents of its cells. Give three examples to support the statement.

  • 2)

    A student of taxonomy was puzzled when told by his professor to look for a key to identify a plant. He went to his friend to clarify what key the professor was referring to? What would the friend explain to him?

  • 3)

    Biological classification is a dynamic and ever-evolving phenomenon which keeps changing with our understanding of life forms. Justify the statements by taking any two examples.

  • 4)

    (i) Why does the interior of bacterial cell appear simple and granular?
    (ii) Which components make cell envelope of bacterial cell?
    (iii) What gives gummy or sticky trait to bacterial cells and if it is not essential for survival, what are its functions?

  • 5)

    In which organisms heterocyst is present? Mention two features of heterocysts. Which features make it suitable for nitrogen-fixation?

CBSE 11th Standard Biology Subject HOT Questions 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why reproduction is necessary? is it essential for survival? If a living organism does not reproduce, in which category it will belong, living or non-living? How is sexual reproduction different from asexual reproduction?

  • 2)

    Do you consider a person in coma, living or dead?

  • 3)

    When did cyanobacteria evolved? Why are they referred  as the earliest colonisers of barren areas?

  • 4)

    Justify the statement Euglena is a  taxonomic puzzle.

  • 5)

    Each plant or group of plants have some phylogenetic significance in relation to evolution. Cycas with any of the few living members of gymnosperms is called as 'relic of the past'. can you establish a phylogenetic relationship of Cycas with any other of plants that justifies the above statement?

CBSE 11th Standard Biology Subject HOT Questions 3 Marks Questions 2021 Part - II - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    The two kingdom classification system placed bacteria, algae, blue-green algae, fungi, mosses, ferns, gymnosperm, and angiosperms, together under one single kingdom-Plantae. According to you, what could have been the basis of such classification?

  • 2)

    What is the special feature of Archaebacteria? How do these obtain food? How are they able to tolerate high temperatures as well as acidity?

  • 3)

    How do some protozoans maintain osmotic pressure?

  • 4)

    Why the vascular plants dominated land?

  • 5)

    Each plant or group of plants have some phylogenetic significance in relation to evolution. Cycas with any of the few living members of gymnosperms is called as 'relic of the past'. can you establish a phylogenetic relationship of Cycas with any other of plants that justifies the above statement?

CBSE 11th Standard Biology Subject HOT Questions 3 Marks Questions 2021 Part - I - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Amoeba is a living matter and a sand particle is non-living matter.Explain.

  • 2)

    Why reproduction is necessary? is it essential for survival? If a living organism does not reproduce, in which category it will belong, living or non-living? How is sexual reproduction different from asexual reproduction?

  • 3)

    Do you consider a person in coma, living or dead?

  • 4)

    In which conditions human beings are difficult to define as living?

  • 5)

    When did cyanobacteria evolved? Why are they referred  as the earliest colonisers of barren areas?

CBSE 11th Standard Biology Subject HOT Questions 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    All the organisms are not yet identified on the earth.Justify the statement.

  • 2)

    What makes species a basic taxonomic category?

  • 3)

    Which type of fungi are also called bracket fungi?

  • 4)

    Why do mosquito bites cause itching?

  • 5)

    What was the drawback of artificial system of classification?

CBSE 11th Standard Biology Subject HOT Questions 2 Marks Questions 2021 Part - II - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What is the characteristic feature of class-Ascomycetes?

  • 2)

    Lichens play important role in biological succession and soil formation. Justify.

  • 3)

    Both gymnosperms and angiosperms bear seeds, then why are they classified separately?

  • 4)

    How do angiosperms support pollinators to carry out pollination is contrast to gymnosperms?

  • 5)

    Why the scientists decalcify the bones?

CBSE 11th Standard Biology Subject HOT Questions 2 Marks Questions 2021 Part - I - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Reproduction cannot be the defining characteristic of living organisms.Justify.

  • 2)

    A plants may have different names in different regions of the country or world. How do botanists solve this problem?

  • 3)

    All the organisms are not yet identified on the earth.Justify the statement.

  • 4)

    How do fungi form partnership with most plants?

  • 5)

    What is the characteristic feature of class-Ascomycetes?

CBSE 11th Standard Biology Subject HOT Questions 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    How does the natural system of classification provide detailed information about the groups?

  • 2)

    Which event in pteridophytes is considered an important step in the evolution of seed habit in plants?

  • 3)

    Why the name given double fertilisation to fertilisation in angiosperms?

  • 4)

    Why cycas is called a living fossil?

  • 5)

    Why pneumatic bones are present in birds?

CBSE 11th Standard Biology Subject HOT Questions 1 Marks Questions 2021 Part - II - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Why the heart of fishes is commonly called 'the venous heart'?

  • 2)

    Why are velamen tissues present in epiphytic roots?

  • 3)

    How the secondary growth in dicot stems is achieved?

  • 4)

    Plasma protein acts as acid-base buffer in the blood . Explain

  • 5)

    In earthworm, from which segment intestine starts and where it ends?

CBSE 11th Standard Biology Subject HOT Questions 1 Marks Questions 2021 Part - I - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    How is diversity in living world related to taxonomy?

  • 2)

    Why lichens are called dual organisms?

  • 3)

    Virus cannot grow on non-living culture medium. Give reason

  • 4)

    Why two kingdom classification continued to be used for a long time?

  • 5)

    Why Seeds remain exposed in gymnosperms?

CBSE 11th Standard Biology Subject Locomotion and Movement Ncert Exemplar 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What is the difference between the matrix of bone and cartilage?

  • 2)

    The three tiny bones present  in middle ear are called ear ossicles. Write them in correct sequence beginning from ear drum.

  • 3)

    Give the location of ball and socket joint in a human body

  • 4)

    Label the different components of actinfilament in the diagram given below.

  • 5)

    Give the name of the cells/tissues in human body which
    (i) exhibit amoeboid movement.
    (ii) exhibit ciliary movement.

CBSE 11th Standard Biology Subject Locomotion and Movement Ncert Exemplar 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What is the difference between the matrix of bone and cartilage?

  • 2)

    The three tiny bones present  in middle ear are called ear ossicles. Write them in correct sequence beginning from ear drum.

  • 3)

    Give the location of ball and socket joint in a human body

  • 4)

    Label the different components of actinfilament in the diagram given below.

  • 5)

    Give the name of the cells/tissues in human body which
    (i) exhibit amoeboid movement.
    (ii) exhibit ciliary movement.

CBSE 11th Standard Biology Subject Plant Growth and Development Ncert Exemplar 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    The rice seedlings infected with fungus Gibberella fujikuroi is called foolish seedlings ? What was the reason behind it?

  • 2)

    Light plays an important role in the life of all organisms. Name any three physiological processes in plants which are affected by light.

  • 3)

    Some varieties of wheat are known as spring wheat, while others are called winter wheat. The former variety is sown and planted in spring and is harvested by the end of the same season. However,latter one if planted in spring, fails to flower or produce mature grains within a span of a flowering season. Explain Why?

  • 4)

    Plant Growth Substances have practical applications. Name the PGS we should use
    a) To increase yield of sugarcane.
    b) Promote the lateral shoot growth
    c) Cause sprouting of potato tuber
    d) Inhibit seed germination

  • 5)

    Where are the following hormones synthesised in plants?
    (i) IAA
    (ii) Gibberellin

CBSE 11th Standard Biology Subject Plant Growth and Development Ncert Exemplar 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    A primary root grows from 5-19 cm in a week. Calculate the absolute growth rate and relative growth rate over the period.

  • 2)

    The rice seedlings infected with fungus Gibberella fujikuroi is called foolish seedlings ? What was the reason behind it?

  • 3)

    Light plays an important role in the life of all organisms. Name any three physiological processes in plants which are affected by light.

  • 4)

    Some varieties of wheat are known as spring wheat, while others are called winter wheat. The former variety is sown and planted in spring and is harvested by the end of the same season. However,latter one if planted in spring, fails to flower or produce mature grains within a span of a flowering season. Explain Why?

  • 5)

    Plant Growth Substances have practical applications. Name the PGS we should use
    a) To increase yield of sugarcane.
    b) Promote the lateral shoot growth
    c) Cause sprouting of potato tuber
    d) Inhibit seed germination

CBSE 11th Standard Biology Subject Respiration in Plants Ncert Exemplar 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    It is known that red muscle fibres in animals can work for longer periods of time continuously. How is this possible?

  • 2)

    The energy yield in terms of ATP is higher in aerobic respiration than during anaerobic respiration. Why is there anaerobic respiration even in organisms that live in aerobic condition like human beings and angiosperms?

  • 3)

    RuBP carboxylase, PEPase, pyruvate dehydrogenase, ATPase, cytochrome oxidase, hexokinase, lactate dehydrogenase. Select/ choose enzymes from the list above which are involved in
    (i) photosynthesis
    (ii) respiration.

  • 4)

    A process is occurring throughout the day in 'X' organism. Cells are participating in this process. During this process, ATP, CO2 and water are formed. It is not a light dependent process.
    (i) Name the process.
    (ii) It is a catabolic or an anabolic process.
    (iii) What could be the raw material of this process?

  • 5)

    Respiration is an energy releasing and enzymatically controlled catabolic process, which involves a stepwise oxidative breakdown of organic substances inside living cells. In this statement about respiration explain the meaning of
    (i) stepwise oxidative breakdown
    (ii) organic substances (used as substrates).

CBSE 11th Standard Biology Subject Respiration in Plants Ncert Exemplar 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    It is known that red muscle fibres in animals can work for longer periods of time continuously. How is this possible?

  • 2)

    The energy yield in terms of ATP is higher in aerobic respiration than during anaerobic respiration. Why is there anaerobic respiration even in organisms that live in aerobic condition like human beings and angiosperms?

  • 3)

    RuBP carboxylase, PEPase, pyruvate dehydrogenase, ATPase, cytochrome oxidase, hexokinase, lactate dehydrogenase. Select/ choose enzymes from the list above which are involved in
    (i) photosynthesis
    (ii) respiration.

  • 4)

    A process is occurring throughout the day in 'X' organism. Cells are participating in this process. During this process, ATP, CO2 and water are formed. It is not a light dependent process.
    (i) Name the process.
    (ii) It is a catabolic or an anabolic process.
    (iii) What could be the raw material of this process?

  • 5)

    Respiration is an energy releasing and enzymatically controlled catabolic process, which involves a stepwise oxidative breakdown of organic substances inside living cells. In this statement about respiration explain the meaning of
    (i) stepwise oxidative breakdown
    (ii) organic substances (used as substrates).

CBSE 11th Standard Biology Subject Chemical Coordination and Integration Ncert Exemplar 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Mention the different between hypothyroidism and hyperthyroidism

  • 2)

    Inflammatory responses can be controlled by a certain steroid.Name the steroid, its source and also its other important functions.

  • 3)

    old people have a weak immune system. What could be the reason?

  • 4)

    Mention the difference between hypothyroidism and hyperthyroidism.

  • 5)

    Correct the following statements by replacing the term underlined.
    (i) Insulin is a steroid hormone.
    (ii) TSH is secreted from the corpus luteum 
    (iii) Tetraiodothyronine is an emergency hormone.
    (iv) The pineal gland is located on the anterior part of the kidney.

CBSE 11th Standard Biology Subject Chemical Coordination and Integration Ncert Exemplar 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Rearrange the following hormones in column I so as to match with their chemical nature in Column II

    Column I Column II
    A. Oxytocin 1.Amnio acid derivative
    B. Epinephrine 2.Steroid
    C. Progesterone 3.Protein
    D. Growth hormone 4.Peptide
  • 2)

    A milkman is very upset one morning as his cow refuses to give any milk. The milkman's wife gets the calf from the shed. On fondling by the calf, the cow gave sufficient milk.
    Describe the role of endocrine gland and pathway associated with this response.

  • 3)

    Mention the different between hypothyroidism and hyperthyroidism

  • 4)

    What are the effects of hypothyroidism (observed during pregnancy) on the development and maturation of a growing baby?

  • 5)

    Correct the following statements by replacing the term underlined.
    (i) Insulin is a steroid hormone.
    (ii) TSH is secreted from the corpus luteum 
    (iii) Tetraiodothyronine is an emergency hormone.
    (iv) The pineal gland is located on the anterior part of the kidney.

CBSE 11th Standard Biology Subject Chemical Coordination and Integration Ncert Exemplar 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Define the terms erythropoiesis. Also name the hormone that simulates it.

  • 2)

    Name the only hormone secreted by pars intermedia of pituitary gland.

  • 3)

    Which of the two adrenocortical layers, zona glomerulosa and zona reticularis lies outside enveloping the other?

  • 4)

    A patient complains of constant thirst excessive passing of urine and low blood pressure. When the doctor checked the patient's blood glucose and blood insulin level, the level were normal or slightly low The doctor diagnosed the conditions as diabetes insipidus. But he decides to measure on more hormone in patient's blood Which hormone does the doctor intend to measure?

  • 5)

    There are many endocrine glands in human body. Name the gland, which is absent in male and the one absent in female.

CBSE 11th Standard Biology Subject Chemical Coordination and Integration Ncert Exemplar 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Define the terms erythropoiesis. Also name the hormone that simulates it.

  • 2)

    Name the only hormone secreted by pars intermedia of pituitary gland.

  • 3)

    Which of the two adrenocortical layers, zona glomerulosa and zona reticularis lies outside enveloping the other?

  • 4)

    A patient complains of constant thirst excessive passing of urine and low blood pressure. When the doctor checked the patient's blood glucose and blood insulin level, the level were normal or slightly low The doctor diagnosed the conditions as diabetes insipidus. But he decides to measure on more hormone in patient's blood Which hormone does the doctor intend to measure?

  • 5)

    There are many endocrine glands in human body. Name the gland, which is absent in male and the one absent in female.

CBSE 11th Standard Biology Subject Neural Control and Coordination Ncert Exemplar 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Rearrange the following in the correct order of involvement in electrical impulse movement - synptic knob, dendrities, cell body, axon terminal and axon. 

  • 2)

    Complete the statement by choosing appropriate match among the following:

    A. Resting potential 1.Chemicals involved in the transmission of impulses at synapses.
    B. Nerve impulse 2.Gap between the presynaptic and postsynaptic neurons.
    C. The synaptic cleft 3.Eletrical potential difference across the resting neural membrane.
    D. Neurotransmitters  4. An electrical wave-like response of a neuron to a simulation.
  • 3)

    Arrange the following n the order of reception and transmission of sound wave from the ear drum Cochlear nerve, external auditory canal, ear drum, stapes incus, malleus, cochlea

  • 4)

    Nervous system and computers share certain common features. Comment in five lines. (Hint: CPU, input-output devices).

  • 5)

    If someone receives a blow on the back of neck, what would be the effect on the person's CNS?

CBSE 11th Standard Biology Subject Neural Control and Coordination Ncert Exemplar 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Rearrange the following in the correct order of involvement in electrical impulse movement - synptic knob, dendrities, cell body, axon terminal and axon. 

  • 2)

    Complete the statement by choosing appropriate match among the following:

    A. Resting potential 1.Chemicals involved in the transmission of impulses at synapses.
    B. Nerve impulse 2.Gap between the presynaptic and postsynaptic neurons.
    C. The synaptic cleft 3.Eletrical potential difference across the resting neural membrane.
    D. Neurotransmitters  4. An electrical wave-like response of a neuron to a simulation.
  • 3)

    Arrange the following n the order of reception and transmission of sound wave from the ear drum Cochlear nerve, external auditory canal, ear drum, stapes incus, malleus, cochlea

  • 4)

    Nervous system and computers share certain common features. Comment in five lines. (Hint: CPU, input-output devices).

  • 5)

    If someone receives a blow on the back of neck, what would be the effect on the person's CNS?

CBSE 11th Standard Biology Subject Cell -The Unit of Life Ncert Exemplar 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Discuss briefly the role nucleolus in the cell actively involved in protein synthesis.

  • 2)

    What are histones? What are their functions?

  • 3)

    Multicellular organisms have division of labour. Explain.

  • 4)

    The genomic content of the nucleus is constant for a given species whereas, the extra chromosomal DNA is found to be variable among the members of a population. Explain.

  • 5)

    Briefly give the contributions of the following scientists in formulating the cell theory.
    (i) Rudolf Virchow
    (ii) Schleiden and Schwarm

CBSE 11th Standard Biology Subject Cell -The Unit of Life Ncert Exemplar 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Discuss briefly the role nucleolus in the cell actively involved in protein synthesis.

  • 2)

    What are histones? What are their functions?

  • 3)

    Multicellular organisms have division of labour. Explain.

  • 4)

    The genomic content of the nucleus is constant for a given species whereas, the extra chromosomal DNA is found to be variable among the members of a population. Explain.

  • 5)

    Briefly give the contributions of the following scientists in formulating the cell theory.
    (i) Rudolf Virchow
    (ii) Schleiden and Schwarm

CBSE 11th Standard Biology Subject Cell -The Unit of Life Ncert Exemplar 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What is the significance of vacuole in a plant cell?

  • 2)

    What does'S' refer to, in 70 Sand 80 S ribosomes?

  • 3)

    Name two type of cells which lack a nucleus.

  • 4)

    What is the feature of a metacentric chromosome?

  • 5)

    What is referred to as satellite chromosome?

CBSE 11th Standard Biology Subject Cell -The Unit of Life Ncert Exemplar 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Mension a single membrane bound organelle, which is rich in hydrolytic enzymes.

  • 2)

    What is the significance of vacuole in a plant cell?

  • 3)

    What does'S' refer to, in 70 Sand 80 S ribosomes?

  • 4)

    Name two type of cells which lack a nucleus.

  • 5)

    What is the feature of a metacentric chromosome?

CBSE 11th Standard Biology Subject Structural Organisation in Animals Ncert Exemplar 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Name the different cells junctions found in tissues.

  • 2)

    Which one the following type of cell is involved in making of the inner walls of large blood vessels?

  • 3)

    Where the sclerities are present in cockroach?

  • 4)

    Which mouth part of cockroach is comparable to our tongue?

  • 5)

    How does a gap junction facilitate intercellular communication?

CBSE 11th Standard Biology Subject Structural Organisation in Animals Ncert Exemplar 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    A muscular fiber tapers at both the ends and does not show striations. Name the muscle fiber.

  • 2)

    Name the different cells junctions found in tissues.

  • 3)

    Which one the following type of cell is involved in making of the inner walls of large blood vessels?

  • 4)

    Where the sclerities are present in cockroach?

  • 5)

    Which mouth part of cockroach is comparable to our tongue?

CBSE 11th Standard Biology Subject Anatomy of Flowering Plants Ncert Exemplar 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What are the charecteristic difference found in vascular tissu of gymnosperms and angiosperms?

  • 2)

    What  are the plant whold show the folowing ?
    (i)Radial vascular bundle
    (ii)Ployarch xylem
    (iii) well developed pith 

  • 3)

    Point out  between dicot and monocot leaf of peepal (Ficus religiosa) and maize (Zea mays)

  • 4)

    What is the difference between lenticels and stomata?

  • 5)

    Epidermal cells are often modified to perform specialised functions in plants. Name some of them and functions they perform.

CBSE 11th Standard Biology Subject Anatomy of Flowering Plants Ncert Exemplar 3 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What are the charecteristic difference found in vascular tissu of gymnosperms and angiosperms?

  • 2)

    What  are the plant whold show the folowing ?
    (i)Radial vascular bundle
    (ii)Ployarch xylem
    (iii) well developed pith 

  • 3)

    Point out  between dicot and monocot leaf of peepal (Ficus religiosa) and maize (Zea mays)

  • 4)

    What is the difference between lenticels and stomata?

  • 5)

    Epidermal cells are often modified to perform specialised functions in plants. Name some of them and functions they perform.

CBSE 11th Standard Biology Subject Anatomy of Flowering Plants Ncert Exemplar 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Product of phototsynthesis is transported from the leaves to various parts of the plant and stored in some cells before being utilised. What are the cells/tissues that store them?

  • 2)

    The cells of this tissue are living and show angular wall thickenings. They provide mechanical support. The tissue is______.

  • 3)

    What is the epidermal cell modification in plants which prevent water loss?

  • 4)

    What is the present on the surface of the leaves which helps the plant prevent loss of water, but is absent in roots?

  • 5)

    What constitutes the cambium ring?

CBSE 11th Standard Biology Subject Anatomy of Flowering Plants Ncert Exemplar 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Identify the tissue system from the following.

  • 2)

    What is the function of phloem parenchyma ?

  • 3)

    What is the epidermal cell modification in plants which prevent water loss?

  • 4)

    What constitutes the cambium ring?

  • 5)

    The cross section of a plant material showed the following features when viewed under the microscope
    (a) Vascular bundles were radially arranged
    (b) Four xylem starnds with exarch condition of protoxylem . To which organ should it be assigned?

CBSE 11th Standard Biology Subject Morphology of Flowering Plants Ncert Exemplar 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In Opuntia the stem is modified into a flattened green structure to perform the function of leaves. Write some other examples of modification of plant parts for the purpose of photosynthesis.

  • 2)

    Tendrils of grapevine are homologous to tensrils of pumpkin, but analogous to those of pea.Justify the above statement

  • 3)

    Reticulate venation is found in dicot leaves, while in monocot levaes venation is of parallel type. Biology being a science of exceptions, find out any exception to this generalisation.

  • 4)

    You have heard about several insectivorous plant that feed on insects. Nepenthes or the pitcher plant is one such example which usually grows in shallow water or in marsh lands. What part of the plant is modified into a 'pitcher'. How does this modification help the plant for food even though it can photosynthesisie like any other green plant?

  • 5)

    Differentiate between pedical and peduncle.

CBSE 11th Standard Biology Subject Morphology of Flowering Plants Ncert Exemplar 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In Opuntia the stem is modified into a flattened green structure to perform the function of leaves. Write some other examples of modification of plant parts for the purpose of photosynthesis.

  • 2)

    Tendrils of grapevine are homologous to tensrils of pumpkin, but analogous to those of pea.Justify the above statement

  • 3)

    Reticulate venation is found in dicot leaves, while in monocot levaes venation is of parallel type. Biology being a science of exceptions, find out any exception to this generalisation.

  • 4)

    You have heard about several insectivorous plant that feed on insects. Nepenthes or the pitcher plant is one such example which usually grows in shallow water or in marsh lands. What part of the plant is modified into a 'pitcher'. How does this modification help the plant for food even though it can photosynthesisie like any other green plant?

  • 5)

    Differentiate between pedical and peduncle.

CBSE 11th Standard Biology Subject Morphology of Flowering Plants Ncert Exemplar 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In swampy areas like Sunderbans in West Bengal, plants bear special kind of roots, called _____________.

  • 2)

    In aquatic plants like Pistia and Eichhornia, leaves and roots are found near________________.

  • 3)

    Roots obtain oxygen from air present in the soil for respiration> In the absence or deficency of O2, root growth is constricted or cimpletely stopped. How do these plants growing in marshlands or swaps obtain their oxygen required for root respiration?

  • 4)

    Add the missing floral organs of the given formula of Fabaceae,______.

  • 5)

    Many pulses of daily used to belong to one of the families below.

CBSE 11th Standard Biology Subject Morphology of Flowering Plants Ncert Exemplar 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In swampy areas like Sunderbans in West Bengal, plants bear special kind of roots, called _____________.

  • 2)

    In aquatic plants like Pistia and Eichhornia, leaves and roots are found near________________.

  • 3)

    Roots obtain oxygen from air present in the soil for respiration> In the absence or deficency of O2, root growth is constricted or cimpletely stopped. How do these plants growing in marshlands or swaps obtain their oxygen required for root respiration?

  • 4)

    Add the missing floral organs of the given formula of Fabaceae,______.

  • 5)

    Many pulses of daily used to belong to one of the families below.

CBSE 11th Standard Biology Subject Animal Kingdom Ncert Exemplar 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In some animal groups, the body is found to be divided into compartments with at least some organs/organ repeated. Name this characteristic feature.

  • 2)

    Body cavity is the cavity present between the body wall and gut wall. In some animals, the body cavity is not lined by mesoderm, Such animals are called ______.

  • 3)

    What is the role of radula in Mollusca?

  • 4)

    Identify the animal in which adults exhibit radial symmetry and larvae exhibit bilateral symmetry?

  • 5)

    Give an example of animal which exhibits alternation of generation.

CBSE 11th Standard Biology Subject Animal Kingdom Ncert Exemplar 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In some animal groups, the body is found to be divided into compartments with at least some organs/organ repeated. Name this characteristic feature.

  • 2)

    Body cavity is the cavity present between the body wall and gut wall. In some animals, the body cavity is not lined by mesoderm, Such animals are called ______.

  • 3)

    Identify the animal in which adults exhibit radial symmetry and larvae exhibit bilateral symmetry?

  • 4)

    Give an example of animal which exhibits alternation of generation.

  • 5)

    Given below are types of cells present in some animals each one is specialised to perform a single function.
    (a) choanocytes
    (b) interstitial cells
    (c) gastrodermal cells
    (d) nematocytes 

CBSE 11th Standard Biology Subject Plant Kingdom Ncert Exemplar 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Food is stored as fluoride starch in Rhodophyceae. Similarly Mannitol is the reserve food material of which group of algae?

  • 2)

    The plant body in higher plants is well - differentiated and well - developed. Roots are the organs used for the purpose of absorption. What is the equivalent of the roots in the less developed lower plants?

  • 3)

    Ther embryo sac of an angiosperm is made up of_______.

  • 4)

    Holdfast,  stipe and frond constitute the plant body in case of ______.

  • 5)

    A  Prothallus is______.

CBSE 11th Standard Biology Subject Plant Kingdom Ncert Exemplar 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    The plant body in higher plants is well - differentiated and well - developed. Roots are the organs used for the purpose of absorption. What is the equivalent of the roots in the less developed lower plants?

  • 2)

    Ther embryo sac of an angiosperm is made up of_______.

  • 3)

    A  Prothallus is______.

  • 4)

    Most algal genera show haplontic life cycle. Name an alga which is 
    i) Haplodiplontic
    ii) diplontic.

  • 5)

    The giant redwood tree (Sequoia sempervirens) is a/an 
    (i) angiosperm
    (ii) free fern
    (iii) pteridophyte
    (iv) gymnosperm

CBSE 11th Standard Biology Subject Biological Classification Ncert Exemplar 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Neurospora, an Ascomycetes fungus has been used as a biological tool to understand the mechanism of plant genetics much in the same way as Drosophila has been used to study animal genetics. What makes Neurospora as a genetic tool?

  • 2)

    How is the five kingdom classification advantageous over the two kingdom classification?

  • 3)

    Polluted water bodies have usually high abundance of plants like Nostoc and Oscillatoria. Give reason.

  • 4)

    Diatoms are called as pearls of ocean. Why ? What is diatomaceous earth ?

  • 5)

    Suppose you accidentally find an old preserved permanent slide without a label. In your effort to identify it, you place the slide under microscope and observe the following features
    (i)  Unicellular
    (ii)  Well-defined nucleus
    (iii) Biflagellate, one flagellum lying longitudinally and other transversely.
    What would you identify it as? Can you name the kingdom it belongs to?

CBSE 11th Standard Biology Subject Biological Classification Ncert Exemplar 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Neurospora, an Ascomycetes fungus has been used as a biological tool to understand the mechanism of plant genetics much in the same way as Drosophila has been used to study animal genetics. What makes Neurospora as a genetic tool?

  • 2)

    How is the five kingdom classification advantageous over the two kingdom classification?

  • 3)

    Polluted water bodies have usually high abundance of plants like Nostoc and Oscillatoria. Give reason.

  • 4)

    Diatoms are called as pearls of ocean. Why ? What is diatomaceous earth ?

  • 5)

    Suppose you accidentally find an old preserved permanent slide without a label. In your effort to identify it, you place the slide under microscope and observe the following features
    (i)  Unicellular
    (ii)  Well-defined nucleus
    (iii) Biflagellate, one flagellum lying longitudinally and other transversely.
    What would you identify it as? Can you name the kingdom it belongs to?

CBSE 11th Standard Biology Subject Biological Classification Ncert Exemplar 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    In the five-kingdom system of  Whittaker, how many kingdoms are eukaryotes?

  • 2)

    Name the organisms living in salty areas.

  • 3)

    What is the  principle underlying the use of cyanobacteria in agricultural fields for crop improvement ?

  • 4)

    Naked cytoplasm, multinucleated and saprophytic are the characteristics of ______.

  • 5)

    Fusion of two gametes which are dissimilar in size is termed as ________.

CBSE 11th Standard Biology Subject Biological Classification Ncert Exemplar 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Are chemosynthetic bacteria autotrophic or heterotrophic?

  • 2)

    How dikaryon formed in fungi?

  • 3)

    An association between roots of higher plants and fungi is called _____.

  • 4)

    The five kingdom classification was proposed by

  • 5)

    What is the  principle underlying the use of cyanobacteria in agricultural fields for crop improvement ?

CBSE 11th Standard Biology Subject The Living World Ncert Exemplar 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    The number and kinds of organisms are not constant. How do you explain this statement ?

  • 2)

    In a given habitat we have 20 plant species and 20 animal species. Should we call it as 'diversity' or 'biodiversity'? Justify your answer.

  • 3)

    Brinjal and potato belong to the same genus Solanum, but two different species. What defines them as separate species?

  • 4)

    A plants may have different names in different regions of the country or world. How do botanists solve this problem?

  • 5)

    Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.

CBSE 11th Standard Biology Subject The Living World Ncert Exemplar 2 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    A ball of snow when rolled over snow increases in mass, volume and size. Is this comparable to growth as seen in living organisms?why?

  • 2)

    Properties of cell organelles are not always found in the molecular constituents of cell organelles. Justify.

  • 3)

    The number and kinds of organisms are not constant. How do you explain this statement ?

  • 4)

    In a given habitat we have 20 plant species and 20 animal species. Should we call it as 'diversity' or 'biodiversity'? Justify your answer.

  • 5)

    Brinjal and potato belong to the same genus Solanum, but two different species. What defines them as separate species?

CBSE 11th Standard Biology Subject The Living World Ncert Exemplar 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Amoeba multiplies by mitotic cell division. Is this phenomenon growth or reproduction? Explain.

  • 2)

    The term systematics refers to______.

  • 3)

    Carolus Linnaeus is considered as father of taxonomy. Name two other botanists known for their contribution to the  field of taxonomy.

  • 4)

    Which is the largest botanical garden in the world? Name a few well-known botanical gardens in India.

  • 5)

    Couplet in taxonomic key means.

CBSE 11th Standard Biology Subject The Living World Ncert Exemplar 1 Marks Questions 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Amoeba multiplies by mitotic cell division. Is this phenomenon growth or reproduction? Explain.

  • 2)

    Define metabolism.

  • 3)

    What does ICZN stand for?

  • 4)

    Genus represents ______.

  • 5)

    Which is the largest botanical garden in the world? Name a few well-known botanical gardens in India.

CBSE 11th Standard Biology Subject Ncert Exemplar 5 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Some of the properties of tissues are not the properties of constituents of its cells. Give three examples to support the statement.

  • 2)

    Brassica campestris Linn
    (i) Give the common name of the plant.
    (ii) What do the first two parts of the name denote?
    (iii) Why are they written in italics?
    (iv) What is the meaning of Linn written at the end of the name?

  • 3)

    A scientist came across a plant, which he feels is a new species. How will he proceed towards its identification, classification and nomenclature?

  • 4)

    Biological classification is a dynamic and ever-evolving phenomenon which keeps changing with our understanding of life forms. Justify the statements by taking any two examples.

  • 5)

    Differentiate between polyp and medusa

CBSE 11th Standard Biology Subject Ncert Exemplar 5 Marks Questions 2021 Part - II - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    What is meant by living ? Give any four defining features of life forms.

  • 2)

    Some of the properties of tissues are not the properties of constituents of its cells. Give three examples to support the statement.

  • 3)

    Brassica campestris Linn
    (i) Give the common name of the plant.
    (ii) What do the first two parts of the name denote?
    (iii) Why are they written in italics?
    (iv) What is the meaning of Linn written at the end of the name?

  • 4)

    A scientist came across a plant, which he feels is a new species. How will he proceed towards its identification, classification and nomenclature?

  • 5)

    Biological classification is a dynamic and ever-evolving phenomenon which keeps changing with our understanding of life forms. Justify the statements by taking any two examples.

CBSE 11th Standard Biology Subject Ncert Exemplar 5 Marks Questions 2021 Part - I - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Some of the properties of tissues are not the properties of constituents of its cells. Give three examples to support the statement.

  • 2)

    Brassica campestris Linn
    (i) Give the common name of the plant.
    (ii) What do the first two parts of the name denote?
    (iii) Why are they written in italics?
    (iv) What is the meaning of Linn written at the end of the name?

  • 3)

    A scientist came across a plant, which he feels is a new species. How will he proceed towards its identification, classification and nomenclature?

  • 4)

    Biological classification is a dynamic and ever-evolving phenomenon which keeps changing with our understanding of life forms. Justify the statements by taking any two examples.

  • 5)

    Differentiate between polyp and medusa

CBSE 11th Standard Biology Subject Ncert Exemplar 3 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Metabolism is a defining feature of all living organisms without exception. Isolated metabolic reactions in vitro are not living things, but surely living reactions.Comment.

  • 2)

    In which conditions human beings are difficult to define as living?

  • 3)

    How do you prepare your own herbarium sheets? What are different tools you carry with you while, collecting plants for the preparation of a herbarium? What information should a preserved plant material on the herbarium sheet provide for taxonomic studies?

  • 4)

    There is a myth that immediately after heavy rains in forest, mushrooms appear in large number and make a very large ring or circle, which may be several metres in diameter. These are called 'fairy rings'. Can you explain the myth of fairy rings in biological terms?

  • 5)

    Cyanobateria and heterophic bacteria have been clubbed together in Eubacteria of Kindom-Monera as per the five kindom classification even though the two are vastly different from each other , Is this grouping of the tow types of taxa in the same kingdom justify ? If so, Why?

CBSE 11th Standard Biology Subject Ncert Exemplar 3 Marks Questions 2021 Part - II - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Metabolism is a defining feature of all living organisms without exception. Isolated metabolic reactions in vitro are not living things, but surely living reactions.Comment.

  • 2)

    How do you prepare your own herbarium sheets? What are different tools you carry with you while, collecting plants for the preparation of a herbarium? What information should a preserved plant material on the herbarium sheet provide for taxonomic studies?

  • 3)

    There is a myth that immediately after heavy rains in forest, mushrooms appear in large number and make a very large ring or circle, which may be several metres in diameter. These are called 'fairy rings'. Can you explain the myth of fairy rings in biological terms?

  • 4)

    Each plant or group of plants have some phylogenetic significance in relation to evolution. Cycas with any of the few living members of gymnosperms is called as 'relic of the past'. can you establish a phylogenetic relationship of Cycas with any other of plants that justifies the above statement?

  • 5)

    A typical angiospermic flower consists of four floral parts. Give the names of the floral parts and their arrangement sequentially.

CBSE 11th Standard Biology Subject Ncert Exemplar 3 Marks Questions 2021 Part - I - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Metabolism is a defining feature of all living organisms without exception. Isolated metabolic reactions in vitro are not living things, but surely living reactions.Comment.

  • 2)

    In which conditions human beings are difficult to define as living?

  • 3)

    How do you prepare your own herbarium sheets? What are different tools you carry with you while, collecting plants for the preparation of a herbarium? What information should a preserved plant material on the herbarium sheet provide for taxonomic studies?

  • 4)

    Cyanobateria and heterophic bacteria have been clubbed together in Eubacteria of Kindom-Monera as per the five kindom classification even though the two are vastly different from each other , Is this grouping of the tow types of taxa in the same kingdom justify ? If so, Why?

  • 5)

    Each plant or group of plants have some phylogenetic significance in relation to evolution. Cycas with any of the few living members of gymnosperms is called as 'relic of the past'. can you establish a phylogenetic relationship of Cycas with any other of plants that justifies the above statement?

CBSE 11th Standard Biology Subject Ncert Exemplar 2 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    A ball of snow when rolled over snow increases in mass, volume and size. Is this comparable to growth as seen in living organisms?why?

  • 2)

    The number and kinds of organisms are not constant. How do you explain this statement ?

  • 3)

    How is the five kingdom classification advantageous over the two kingdom classification?

  • 4)

    Polluted water bodies have usually high abundance of plants like Nostoc and Oscillatoria. Give reason.

  • 5)

    Suppose you accidentally find an old preserved permanent slide without a label. In your effort to identify it, you place the slide under microscope and observe the following features
    (i)  Unicellular
    (ii)  Well-defined nucleus
    (iii) Biflagellate, one flagellum lying longitudinally and other transversely.
    What would you identify it as? Can you name the kingdom it belongs to?

CBSE 11th Standard Biology Subject Ncert Exemplar 2 Marks Questions 2021 Part - II - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Diatoms are called as pearls of ocean. Why ? What is diatomaceous earth ?

  • 2)

    Match the following

    A. Amphibia 1. Air biadder
    B. Mammals 2. Cartilaginous notochord
    C. Chondrichthyes 3. Mammary gland
    D. Osteichthyes 4. Dual habitat
  • 3)

    Match the column I with columnII and choose the correct option.

    Column I Column II
    A.Porifera Canal system
    B.Aschelminthes Muscular,pharynx,combplates
    C.Annelida Jointed appendages
    D.Arthropoda Metameres
  • 4)

    Reticulate venation is found in dicot leaves, while in monocot levaes venation is of parallel type. Biology being a science of exceptions, find out any exception to this generalisation.

  • 5)

    You have heard about several insectivorous plant that feed on insects. Nepenthes or the pitcher plant is one such example which usually grows in shallow water or in marsh lands. What part of the plant is modified into a 'pitcher'. How does this modification help the plant for food even though it can photosynthesisie like any other green plant?

CBSE 11th Standard Biology Subject Ncert Exemplar 2 Marks Questions 2021 Part - I - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    A ball of snow when rolled over snow increases in mass, volume and size. Is this comparable to growth as seen in living organisms?why?

  • 2)

    Properties of cell organelles are not always found in the molecular constituents of cell organelles. Justify.

  • 3)

    The number and kinds of organisms are not constant. How do you explain this statement ?

  • 4)

    A plants may have different names in different regions of the country or world. How do botanists solve this problem?

  • 5)

    How is the five kingdom classification advantageous over the two kingdom classification?

CBSE 11th Standard Biology Subject Ncert Exemplar 1 Marks Questions With Solution 2021 - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Define metabolism.

  • 2)

    The term systematics refers to______.

  • 3)

    Are chemosynthetic bacteria autotrophic or heterotrophic?

  • 4)

    Holdfast,  stipe and frond constitute the plant body in case of ______.

  • 5)

    Give an example of animal which exhibits alternation of generation.

CBSE 11th Standard Biology Subject Ncert Exemplar 1 Marks Questions 2021 Part - II - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    Amoeba multiplies by mitotic cell division. Is this phenomenon growth or reproduction? Explain.

  • 2)

    Define metabolism.

  • 3)

    Carolus Linnaeus is considered as father of taxonomy. Name two other botanists known for their contribution to the  field of taxonomy.

  • 4)

    Genus represents ______.

  • 5)

    How dikaryon formed in fungi?

CBSE 11th Standard Biology Subject Ncert Exemplar 1 Marks Questions 2021 Part - I - by Jyoti Hirani - Ghorakhal View & Read

  • 1)

    The term systematics refers to______.

  • 2)

    Which is the largest botanical garden in the world? Name a few well-known botanical gardens in India.

  • 3)

    Are chemosynthetic bacteria autotrophic or heterotrophic?

  • 4)

    In the five-kingdom system of  Whittaker, how many kingdoms are eukaryotes?

  • 5)

    The plant body in higher plants is well - differentiated and well - developed. Roots are the organs used for the purpose of absorption. What is the equivalent of the roots in the less developed lower plants?

CBSE 11th Standard Biology Structural Organisation In Planta And Animals (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Structural Organisation In Animals (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Respiration In Plants (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Plant Physiology (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Plant Kingdom (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Plant Growth And Development (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Photosynthesis in Higher Plants (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Neural Control And Coordination (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Locomotion And Movement (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Human Physiology (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Excretory Products And Their Elimination (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Diversity In the Living World (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Chemical Coordination And Integration (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Cell Structure And Functions (Textbook) - 2021 - by users_admin View & Read

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CBSE 11th Standard Biology Body Fluids And Circulation (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Biomolecules (Textbook) - 2021 - by users_admin View & Read

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CBSE 11th Standard Biology Animal Kingdom (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Anatomy Of Flowering Plants (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Mineral Nutrition (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Contents (Textbook) - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Textbook - 2021 - by users_admin View & Read

CBSE 11th Standard Biology Syllabus 2019-20 - by users_admin View & Read

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CBSE 11th Standard Biology Photosynthesis in Higher Plants Key Points - by users_admin View & Read

CBSE 11th Standard Biology Neural control and coordination Key Points - by users_admin View & Read

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CBSE 11th Standard Biology Mineral Nutrition Key Points - by users_admin View & Read

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CBSE 11th Standard Biology Chemical coordination and integration Key Points - by users_admin View & Read

CBSE 11th Standard Biology Cell The unit of life Key Points - by users_admin View & Read

CBSE 11th Standard Biology Cell Cycle and Cell Division Key Points - by users_admin View & Read

CBSE 11th Standard Biology Breathing and Exchange of Gases Key Points - by users_admin View & Read

CBSE 11th Standard Biology Body Fluids and Circulation Key Points - by users_admin View & Read

CBSE 11th Standard Biology Biomolecules Key Points - by users_admin View & Read

CBSE 11th Standard Biology Biological classification Key Points - by users_admin View & Read

CBSE 11th Standard Biology Animal Kingdom Key Points - by users_admin View & Read

CBSE 11th Standard Biology Anatomy of Flowering Plants Key Points - by users_admin View & Read

CBSE 11th Standard Biology Syllabus - by users_admin View & Read