11th Standard CBSE Biology Study material & Free Online Practice Tests - View Model Question Papers with Solutions for Class 11 Session 2019 - 2020
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Biology Question Papers

CBSE 11th Biology - The Living World Model Question Paper - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What is the full form of ICBN?

  • 2)

    Which is the topmost taxa in zoology?

  • 3)

    Which  the topmost taxa in Botany?

  • 4)

    Which of the following can also be made in your home?

  • 5)

    Which of the following characteristic of living beings, can also be observed in some non-livings?

CBSE 11th Biology - Full Syllabus One Mark Question Paper with Answer Key - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Which of the following scientists started the practice of using biological names?

  • 2)

    What is the full form of ICBN?

  • 3)

    Which is the topmost taxa in zoology?

  • 4)

    Which  the topmost taxa in Botany?

  • 5)

    Why are biological names written in Italics?

CBSE 11th Biology - Full Syllabus Five Marks Questions - 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)

    Algae are known to reproduce asexually by a variety of spores under different environmental condition. Name these spores and the conditions under which they are produced.

  • 3)

    Write an account of general features of roundworms.

  • 4)

    Describe the various types of placentations found in flowering plants.

  • 5)

    The diagram shows some of the structures present in an animal cell.

    Which of these structures is responsible for
    (i) Manufacture of lipids and steroids 
    (ii) Release of energy
    (iii) Manufacture of hormones and digestive enzymes
    (iv) Production of spindle fibres in cell division 
    (v) Endo and exocytosis?

CBSE 11th Biology - Full Syllabus Four Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Ria went to see the zoo in her town with her parents and saw many wild animals, their food habits, behavior, etc. She saw that there was a wide variety of animal life in the zoo. But she was amazed to see that the board placed in front of lion cage and monkey place which tells that both were mammals. However, she thought that they were totally different in appearance.
    (i) Why lions and monkeys are considered to be mammals?
    (ii) Explain the scientific reason to maintain a zoological park.
    (iii) Is there any similar place to see a variety of plants? If any, then name some.
    (iv) What values are shown by Ria?

  • 2)

    What is the need of a classification system in biology? How did different classification systems develop over a period of time?

  • 3)

    Cork cambium forms tissues that form the cork. Do you agree with this statement? Explain.

  • 4)

    Describe the various types of placentations found in flowering plants.

  • 5)

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

CBSE 11th Biology - Full Syllabus Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Write any three advantages of scientific names.

  • 2)

    Why is death considered as regulatory process on the earth?

  • 3)

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

  • 4)

    Write an account on modes of respiration in animals with examples.

  • 5)

    Name the main excretory organs of cockroach. Write the structure of these organs.

CBSE 11th Biology - Full Syllabus Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    List out the features which distinguish living things from non-living things.

  • 2)

    Non-living things also grow. Explain the statement with example.

  • 3)

    In which virus two single RNA strands are present? What is the role of reverse transcriptase?

  • 4)

    Which of the organisms are called jewels of the plant world ? Elaborate about them.

  • 5)

    How would you distinguish monocots from dicots?

11th CBSE Biology - Chemical Coordination and Integration Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

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

  • 2)

    List the hormones secreted by the following:
    (a) Hypothalamus
    (b) Pituitary
    (c) Thyroid
    (d) Parathyroid
    (e) Adrenal
    (f) Pancreas
    (g) Testis
    (h) Ovary
    (i) Thymus
    (j) Atrium
    (k) Kidney
    (l) G-I Tract

  • 3)

    Calcium plays a very important role in the formation of bones. Write about the role of endocrine glands and hormones responsible for maintaining calcium homoeostasis.

  • 4)

    Write short notes on the functions of the following hormones:
    (a) Parathyroid hormone (PTH)
    (b) Thyroid hormones
    (c) Thymosins
    (d) Androgens
    (e) Estrogens
    (j) Insulin and Glucagon

  • 5)

    Give a detail explanation of pituitary gland

11th Standard CBSE Biology - Neural Control and Coordination Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Briefly describe the structure of the following:
    (a) Brain (b) Eye (c) Ear

  • 2)

    Compare the following:
    (a) Central neural system (CNS) and Peripheral neural system (PNS)
    (b) Resting potential and action potential
    (c) Choroid and retina

  • 3)

    Explain the following processes.
    (a) Polarisation of the membrane of a nerve fibre
    (b) Depolarisation of the membrane of a nerve fibre
    (c) Conduction of a nerve impulse along a nerve fibre
    (d) Transmission of a nerve impulse across a chemical synapse

  • 4)

    Draw labelled diagrams of the following:
    (a) Neuron
    (e) Eye
    (b) Brain
    (d) Ear

  • 5)

    Write short notes on the following:
    (a) Neural coordination
    (b) Forebrain
    (c) Midbrain
    (d) Hindbrain
    (e) Retina
    (f) Ear ossicles
    (g) Cochlea
    (h) Organ of Corti
    (i) Synapse

11th Standard CBSE Biology - Locomotion and Movement Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Describe the important steps in muscle contraction.

  • 2)

    Explain the structure of the vertebral column of human.

  • 3)

    Write the difference between:
    (a) Actin and Myosin (b) Red and White muscles (c) Pectoral and Pelvic girdle

  • 4)

    Describe different types of joints in the human skeleton.

  • 5)

    Differentiate between pectoral and pelvic girdle

11th Standard CBSE Biology - Excretory Products and Their Elimination Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    What is the function of collecting duct in kidneys?

  • 2)

    Terrestrial animal are generally either ureotelic or uricotelic, not ammonotelic why?

  • 3)

    The glomerular filtrate in the loop of Henle gets concentrated in the descending and then gets diluted in the ascending limbs.Explain

  • 4)

    (i) Study the given structure carefully and label the parts given as A, B, C, D and E.
    (ii) Give one major function of each of these.

  • 5)

    With the help of suitable diagram describe the structure of human excretory system.

11th CBSE Biology - Body Fluids and Circulation Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Write the differences between:
    (a) Blood and Lymph
    (b) Open and Closed system of circulation
    (c) Systole and Diastole
    (d) Pnoaue and T-wave

  • 2)

    Describe the evolutionary change in the pattern of heart among the vertebrates.

  • 3)

    Draw a standard ECG and explain the different segments in it.

  • 4)

    Explain different types of blood groups and donor compatibility making a table.

  • 5)

    Describes the evolutionary change in the pattern of heart among the vertebrates.

11th Standard CBSE Biology - Breathing and Exchange of Gases Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Explain the role of haemoglobin in transport of oxygen.

  • 2)

    Explain the neural control of respiration.

  • 3)

    What is tidal volume? Find out the tidal volume for a healthy human in an hour time?
     Also, label the parts A, B, Cand D in the given, figure of alveolus.

  • 4)

    What are the major transport mechanisms for CO2? Explain.
     

  • 5)

    Define oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?

11th CBSE Biology - Digestion and Absorption Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Name of the largest gland present in human body. Describe its role in digestion of food.

  • 2)

    How does butter in your food get digested and absorbed in the body?Explain

  • 3)

    Discuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.

  • 4)

    How are the activities of gastrointestinal tract regulated?

  • 5)

    What are the functions of liver?

11th Standard CBSE Biology - Plant Growth and Development Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    What are plant growth regulators? Name any four different chemical nature of them with one example of each.

  • 2)

    Mention the factors which prove that phytohormones act synergistically or antagonistically.

  • 3)

    Define differentiation? Also, give details about how can you distinguish between dedifferentiation and redifferentiation?

  • 4)

    Describe briefly:
    Arithmetic growth

  • 5)

    Describe briefly:
    Geometric growth

11th CBSE Biology - Respiration in Plants Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    The maximum concentration of alcohol produced by natural fermentation is 13%. But most of the alcoholic preparations for human consumption contain more than this percentage. How this higher percentage is achieved?

  • 2)

    Give a diagrammatic representation of ATP synthesis.

  • 3)

    Give a diagrammatic representation of fermentation.

  • 4)

    What is the significance of stepwise release of energy in respiration.

  • 5)

    Differentiate between Aerobic respiration and Fermentation

11th Standard CBSE Biology - Photosynthesis in Higher Plants Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Is it correct to say that photosynthesis occurs only in leaves of a plant? Besides leaves, what are the other parts be capable of carrying out photosynthesis?Justify.

  • 2)

    Give comparison between the cyclic and non-cyclic photophosphorylation

  • 3)

    Why is RuBisCO enzyme the most abundant enzyme in the world?

  • 4)

    Six turns of Calvin cycle are required to generate one mole of glucose. Explain.

  • 5)

    What are special anatomical features displayed by leaves of C4 -plants? How do they provide an advantage over the structure of C3 -plants?

CBSE 11th Biology - Body Fluids and Circulation Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    A person suffering from fever is advised to take blood test. What may happen to his WEC count and why?

  • 2)

    What is meant by double circulation? What is its significance?

  • 3)

    Draw a standard ECG and explain the different segments in it.

  • 4)

    Explain different types of blood groups and donor compatibility making a table.

  • 5)

    Describes the evolutionary change in the pattern of heart among the vertebrates.

CBSE 11th Biology - Excretory Products and Their Elimination Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What is the function of Henle's loop?

  • 2)

    Draw a well labelled diagram of glomerulus.

  • 3)

    What is the function of collecting duct in kidneys?

  • 4)

    Terrestrial animal are generally either ureotelic or uricotelic, not ammonotelic why?

  • 5)

    The glomerular filtrate in the loop of Henle gets concentrated in the descending and then gets diluted in the ascending limbs.Explain

CBSE 11th Biology - Locomotion and Movement Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Explain the structure of the vertebral column of human.

  • 2)

    Describe the structure of the rib cage of human.

  • 3)

    Give a description of the appendicular skeleton in human.

  • 4)

    What is osteoporosis? Why are women at a greater risk of suffering from osteoporosis? Suggest some precautionary means to avoid osteoporosis.

  • 5)

    Write the difference between:
    (a) Actin and Myosin (b) Red and White muscles (c) Pectoral and Pelvic girdle

CBSE 11th Biology - Neural Control and Coordination Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Briefly describe the structure of the following:
    (a) Brain (b) Eye (c) Ear

  • 2)

    Compare the following:
    (a) Central neural system (CNS) and Peripheral neural system (PNS)
    (b) Resting potential and action potential
    (c) Choroid and retina

  • 3)

    Explain the following processes.
    (a) Polarisation of the membrane of a nerve fibre
    (b) Depolarisation of the membrane of a nerve fibre
    (c) Conduction of a nerve impulse along a nerve fibre
    (d) Transmission of a nerve impulse across a chemical synapse

  • 4)

    Draw labelled diagrams of the following:
    (a) Neuron
    (e) Eye
    (b) Brain
    (d) Ear

  • 5)

    Write short notes on the following:
    (a) Neural coordination
    (b) Forebrain
    (c) Midbrain
    (d) Hindbrain
    (e) Retina
    (f) Ear ossicles
    (g) Cochlea
    (h) Organ of Corti
    (i) Synapse

CBSE 11th Biology - Chemical Coordination and Integration Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Justify the name endocrine gland.

  • 2)

    How does parathyroid hormone influences calcium uptake in the body?

  • 3)

    How do fight or flight hormones prepare our body to fight emergency?

  • 4)

    What are secondary sexual characters?

  • 5)

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

CBSE 11th Biology - Breathing and Exchange of Gases Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Explain the role of haemoglobin in transport of oxygen.

  • 2)

    Give a chart of partial pressure of oxygen and carbon dioxide at different places in the respiratory system:

  • 3)

    What is tidal volume? Find out the tidal volume for a healthy human in an hour time?
     Also, label the parts A, B, Cand D in the given, figure of alveolus.

  • 4)

    What are the major transport mechanisms for CO2? Explain.
     

  • 5)

    Define oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?

CBSE 11th Biology - Digestion and Absorption Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Name of the largest gland present in human body. Describe its role in digestion of food.

  • 2)

    How does butter in your food get digested and absorbed in the body?Explain

  • 3)

    Discuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.

  • 4)

    How are the activities of gastrointestinal tract regulated?

  • 5)

    What are the functions of liver?

CBSE 11th Biology - Plant Growth and Development Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What are plant growth regulators? Name any four different chemical nature of them with one example of each.

  • 2)

    While experimentation, why do you think it is difficult to assign any effect seen to any single hormone?

  • 3)

    Mention the factors which prove that phytohormones act synergistically or antagonistically.

  • 4)

    Mention the phenomenon of growth in plants. Explain the phases of growth in detail.

  • 5)

    Define differentiation? Also, give details about how can you distinguish between dedifferentiation and redifferentiation?

CBSE 11th Biology - Respiration in Plants Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Give a diagrammatic representation of ATP synthesis.

  • 2)

    Give a tabular representation of respiratory balance sheet.

  • 3)

    Give a diagrammatic representation of fermentation.

  • 4)

    What is the significance of stepwise release of energy in respiration.

  • 5)

    Differentiate between Aerobic respiration and Fermentation

CBSE 11th Biology - Photosynthesis in Higher Plants Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Is it correct to say that photosynthesis occurs only in leaves of a plant? Besides leaves, what are the other parts be capable of carrying out photosynthesis?Justify.

  • 2)

    Give comparison between the cyclic and non-cyclic photophosphorylation

  • 3)

    What are special anatomical features displayed by leaves of C4 -plants? How do they provide an advantage over the structure of C3 -plants?

  • 4)

    RuBisCO is an enzyme that acts both as a carboxylase and oxygenase.Why do you think RuBisCo carries out more carboxylation in C4-plants?

  • 5)

    Under what condition are C4-plants superior to C3?

CBSE 11th Biology - Mineral Nutrition Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What are various symptoms of deficiency in plants?

  • 2)

    Explain with examples macronutrients,micronutrients,beneficial nutrients,toxic elements and essential elements.

  • 3)

    Hydroponics have been shown to be a successful technique for growing of plants, yet most of the crops are still grown on land. Why?

  • 4)

    Name at least five different deficiency symptoms in plants. Describe them and correlate them with the concerned mineral deficiency.

  • 5)

    How are the minerals absorbed by the plants?

11th Standard CBSE Biology - Transport in Plants Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Define transpiration pull diagrammatically explain the route of transpiration pull and ascent of sap in plants.

  • 2)

    (i) With the help of well-labeled diagrams, describe the process of plasmolysis in plants, giving appropriate examples.
    (ii) Explain what will happen to a plant cell if it is kept in a solution having higher water potential.

  • 3)

    Observe the given figure and answer the following questions.

    (i) State the nature of the solution marked (1).
    (ii) What process has been depicted in figures C to D?
    (iii) What will be present in the space marked as (2)?
    (iv) In which figures turgor pressure will be zero?
    (v) In which figures wall pressure will be positive?

  • 4)

    A portion of transverse section of root is shown in the diagram. Label 1-5 and also write the function of parts 2 and 3. Briefly, explain the symplast pathway.

  • 5)

    Figure given below shows a plant at (a) 8 am and (b) shows the same plant at 6 pm on the same day.

    (i)Name the condition shown by the plant in (b).
    (ii)(a)State two environmental condition that may have led to the change in appearance of the plant.
    (b)Explain how environmental conditions have brought about this change

11th Standard CBSE Biology - Mineral Nutrition Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    What are various symptoms of deficiency in plants?

  • 2)

    Explain with examples macronutrients,micronutrients,beneficial nutrients,toxic elements and essential elements.

  • 3)

    Hydroponics have been shown to be a successful technique for growing of plants, yet most of the crops are still grown on land. Why?

  • 4)

    Name at least five different deficiency symptoms in plants. Describe them and correlate them with the concerned mineral deficiency.

  • 5)

    How are the minerals absorbed by the plants?

11th CBSE Biology - Transport in Plants Five Marks Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Define transpiration pull diagrammatically explain the route of transpiration pull and ascent of sap in plants.

  • 2)

    (i) With the help of well-labeled diagrams, describe the process of plasmolysis in plants, giving appropriate examples.
    (ii) Explain what will happen to a plant cell if it is kept in a solution having higher water potential.

  • 3)

    A portion of transverse section of root is shown in the diagram. Label 1-5 and also write the function of parts 2 and 3. Briefly, explain the symplast pathway.

  • 4)

    Differentiate between the following - Apoplast and Symplast pathways of movement of water in plants

  • 5)

    Differentiate between the following -Guttation and Transpiration

11th Standard CBSE Biology - Cell Cycle and Cell Division Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Which cell in humans does not have capacity to repair through cell division?

  • 2)

    Briefly describe the significance of cell division.

  • 3)

    Describe briefly the phases of meiotic cell division.

  • 4)

    Explain meiosis-II in an animal cell.

  • 5)

    Explain why a pair of homologous chromosomes is genetically different, but a pair of sister chromatids is genetically identical before crossing over in meiosis.

11th Standard CBSE Biology - Biomolecules Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Discuss the types of enzyme cofactors that are required for the efficient activity for enzymes.

  • 2)

    What is the concept of metabolism? What are the metabolic basis for living?

  • 3)

    (i) Identify the structure shown in figure.
    (ii) Write the measurement (distance) of the parts marked (A), (B), (C).

    (iii) How many H-bonds are there at the place marked as(6)?
    (iv) Which form of DNA is shown in the figure?
    (v) Whether B type DNA has left-handed spiral structure or right-handed?

  • 4)

    Illustratea glycosidic, peptide and a phosphodiester bond.

  • 5)

    Find and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any industry which manufactures the compounds-by isolation. Find out who are the buyers.

11th Standard CBSE Biology - Cell: The Unit of Life Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Differentiate between prokaryotic and eukaryotic cells.

  • 2)

    What is endome.mbrane system in a cell?

  • 3)

    What is the benefit of cell walls, in plant cells?

  • 4)

    The diagram shows some of the structures present in an animal cell.

    Which of these structures is responsible for
    (i) Manufacture of lipids and steroids 
    (ii) Release of energy
    (iii) Manufacture of hormones and digestive enzymes
    (iv) Production of spindle fibres in cell division 
    (v) Endo and exocytosis?

  • 5)

    Describe the structure of the following with the help of labelled diagram
    (i) Nucleus
    (ii) Centrosome

11th Standard CBSE Biology - Structural Organisation in Animals Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Stratified epithelial cells have limited role in secreation . Justify their role in our skin 

  • 2)

    Why are neurons called excitable cells ? Mention thge special features of the membrane of the neuron

  • 3)

    Differences Between Blatta orientalis (oriental cockroach) and peripalnata americana (Aamerican cockroach).  

  • 4)

    Distinguish between a male cockroach and female cockroach.

  • 5)

    Distinguish between a male frog and female frog.

11th Standard CBSE Biology - Anatomy of Flowering Plants Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What is the difference between lenticels and stomata

  • 2)

    Deciduous  plants shed their leaves during hot summer or autumn. This process of shedding of keaves is called abscission .Apart from physiological changes, what anatomical mechanism is involved in the abscission of leaves?

  • 3)

    What is the commercial source of cork?How is it formed?

  • 4)

    Explain the process of secondary growth in the stems of woody angiosperms. What is its significance?

  • 5)

    Define the following terms:
    (a) Aestivation
    (b) Placentation
    (c) Actinomorphic
    (d) Zygomorphic
    (e) Superior ovary
    (f) Perigynous flower
    (g) Epipetalous stamen

11th Standard CBSE Biology - Morphology of Flowering Plants Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Compare the androecium of family-Fabaceae, Solanaceae, and Liliaceae.

  • 2)

    Write the medicinal value of family -Fabaceae, Solanaceae, and Liliaceae

  • 3)

    Describe the modification of stem with suitable examples. "Thorns"

  • 4)

    Describe the modification of stem with suitable examples. "Fleshy stems"

  • 5)

    How do various leaf modifications help plants?

11th Standard CBSE Biology - Animal Kingdom Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What are basis of classification of Animal Kingdom? Give detail on levels of organisation.

  • 2)

    What are the symmetries based on which animals can be classified? Describe with appropriate diagram.

  • 3)

    Write short notes on following:
    (a) Diploblastic and Triploblastic Organization
    (b) Different types of coelom
    (c) Segmentation
    (d) Notochord

  • 4)

    Give a diagrammatic representation of the Animal Kingdom based on broad features.

  • 5)

    What are the key features of phylum Porifera? Write in detail.

11th CBSE Biology - Cell Cycle and Cell Division Five Mark Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Give a description of metaphase I of meiosis

  • 2)

    What is the process of cell division in prokaryotes?

  • 3)

    Briefly describe the significance of cell division.

  • 4)

    Describe briefly the phases of meiotic cell division.

  • 5)

    Explain meiosis-II in an animal cell.

11th Standard CBSE Biology - Biomolecules Five Mark Model Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    What are the functions of polysaccharides?

  • 2)

    What is the concept of metabolism? What are the metabolic basis for living?

  • 3)

    Illustratea glycosidic, peptide and a phosphodiester bond.

  • 4)

    Find and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any industry which manufactures the compounds-by isolation. Find out who are the buyers.

  • 5)

    Give a detail explanation of structure of protein.

11th CBSE Biology - Cell: The Unit of Life Five Mark Model Questions - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    The diagram shows some of the structures present in an animal cell.

    Which of these structures is responsible for
    (i) Manufacture of lipids and steroids 
    (ii) Release of energy
    (iii) Manufacture of hormones and digestive enzymes
    (iv) Production of spindle fibres in cell division 
    (v) Endo and exocytosis?

  • 2)

    Describe the structure of the following with the help of labelled diagram
    (i) Nucleus
    (ii) Centrosome

  • 3)

    Name two cell-organelles that are double membrane-bound. What are the characteristics of these two organelles? State their functions and draw labelled diagrams of both.

  • 4)

    What is a centromere? How does the position of centromere forms the basis of classification of chromosomes? Support your answer with a diagram showing the position of centromere on different types of chromosomes.

  • 5)

    With suitable diagram describe animal cell.

11th CBSE Biology - Structural Organisation in Animals Five Mark Model Questions - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Stratified epithelial cells have limited role in secreation . Justify their role in our skin 

  • 2)

    Differences Between Blatta orientalis (oriental cockroach) and peripalnata americana (Aamerican cockroach).  

  • 3)

    Distinguish between a male cockroach and female cockroach.

  • 4)

    Describe various types of epithelial tissues with the help of labelled diagrams.

  • 5)

    With the help of appropriate diagrams explain various kinds of muscular tissues with their junctions.

CBSE 11th Biology - The Living World Five Marks Questions - 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)

    Try to collect all the currently accepted meanings for the word 'species'. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand and bacteria on the other hand.

  • 5)

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

11th Standard CBSE Biology - Biological Classification Five Marks Questions - 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)

    What is three domain system? Who introduced it? Name these domains and their salient features.

  • 3)

    Describe the cell structure of fungus in details

  • 4)

    Write difference between ascocarp and basidiocarp

  • 5)

    Give a brief account of viruses with respect to their structure and nature of genetic materials. Also, name four common viral diseases.

11th Standard CBSE Biology - Plant Kingdom Five Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Algae are known to reproduce asexually by a variety of spores under different environmental condition. Name these spores and the conditions under which they are produced.

  • 2)

    Mention the ploidy of the following.
    Protonemel cell of a moss, primary endosperm nucleus in dicot, leaf cell of moss, prothallus of a fern, gemma cell in Marchantia, meristem cell of monocot, ovum of a liverwort and zygote of a fern.

  • 3)

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

  • 4)

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

  • 5)

    What is heterospory? Briefly, comment on its significance. Give two examples.

CBSE 11th Biology - Respiration in Plants Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Name the end products of aerobic and anaerobic fate of glycolysis.List two ways by which molecules of ATP are produced in glycolysis during aerobic respiration in a cell.

  • 2)

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

  • 3)

    Name the site(s) of pyruvate synthesis.Also, write the chemical reaction, wherein pyruvic acid dehydrogenase acts as a catalyst.

  • 4)

    What is Pentose Phosphate Pathway(PPP)?Where does it take place?

  • 5)

    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?

CBSE 11th Biology - Plant Growth and Development Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    How are gibberellins useful in agriculture to improve productivity. Give any three points in support of your answer.

  • 2)

    The role of ethylene and abscisic acid is both positive and negative. Justify the statement.

  • 3)

    Both animals and plants grow. Why do we say that growth and differentiation in plants is open and not so in animals? Does this statement hold true for sponges also?

  • 4)

    Nicotiana tobacum,(tobacco) a short-day plant, when exposed to more than the critical period of light fails to flower. Explain.

  • 5)

    If the critical photoperiod for a short-day plant is 13hrs of daylight, will it flower when there are 15 hrs of daylight?

CBSE 11th Biology - Digestion and Absorption Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    How is fat absorbed in the blood?

  • 2)

    What would happen if HCl will not be secreted in the stomach?

  • 3)

    Distinguish between constipation and indigestion.Mention their major causes.

  • 4)

    Explain the action of different enzymes in succus entericus.

  • 5)

    Give the name along with the function of each of the three major kinds of cells of the gastric glands.

CBSE 11th Biology - Breathing and Exchange of Gases Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

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

  • 2)

    How is respiration regulated?

  • 3)

    Explain chemical control of respiratory rhythm

  • 4)

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

  • 5)

    Which of the regulatory centre of respiration can reduce the inspiratory duration when it is stimulated?

CBSE 11th Biology - Excretory Products and Their Elimination Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Show the structure of a renal corpuscle with the help of a diagram

  • 2)

    What is ureotelism? Describe the process of formation of urea.

  • 3)

    Where does the urine formation take place? Name the processes involved in the formation of urine.

  • 4)

    Where do ultrafiltration, reabsorption, and secretion occur in a nephron?

  • 5)

    How is glomerular filtrate hypertonic and hypotonic in descending and ascending limb of loop of Henle,respectively.What is the effect of ADH on collecting tubules.

CBSE 11th Biology - Neural Control and Coordination Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What are the major differences between dendrites and axons?

  • 2)

    Explain the role of Na+ in the generation of action potential.

  • 3)

    Differentiate between Cerebrum and cerebellum.

  • 4)

    Differentiate between Thalamus and hypothalamus

  • 5)

    Answer briefly
    (i) How do you perceive the colour of an object?
    (ii) Which part of our body helps us in maintaining the body balance?
    (iii) How does the eye regulate the amount of light that falls on the retina?

11th Standard CBSE Biology - Locomotion and Movement Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    How do you distinguish between a skeletal muscle and a cardiac muscle.

  • 2)

    In old age, people often suffer from stiff and inflammed joints. What is this condition called? What are the possible reasons for these symptoms?

  • 3)

    Write a few lines about gout

  • 4)

    Describe the important steps in muscle contraction.

  • 5)

    Why are muscles rigidly locked in whatever position they are after death? What is the phenomenon known as?

11th Standard CBSE Biology - Body Fluids and Circulation Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What is the significance of hepatic portal system in the circulatory system?

  • 2)

    Why renal portal system is absent in mammals?

  • 3)

    An Rh- woman is carrying an Rh+ foetus for the second time. Describe the consequences of Rh- incompatibility in this case?

  • 4)

    Explain the chemical events that takes place to form a blood clot to seal the wound.

  • 5)

    Answer the following
    (i) Name the major site where RBCs are formed.
    (ii) Which part of heart is responsible for initiating and maintaining its rhythmic activity?
    (iii) What is specific in the heart of crocodiles among reptilians?

11th Standard CBSE Biology - Photosynthesis in Higher Plants Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Explain how during light reaction of photosynthesis, ATP synthesis as a chemiosmotic phenomenon takes place?

  • 2)

    Even though a very few cells in a C4-plant carry out the biosynthetic Calvin pathway, yet they are high productive. Can you discus why?

  • 3)

    What can we conclude from the statement that the action and absorption spectra of photosynthesis overlap? At which wavelength, do they show peaks?

  • 4)

    Photosynthetic organisms occur at different depths in the ocean.Do they receive the light?How do they adapt to carry out photosynthesis under these conditions?

  • 5)

    What conditions enable RuBisCO to function as an Oxygenase? Explain the ensuring process.

11th Standard CBSE Biology - Mineral Nutrition Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Mention the difference between passive and active salt absorption.

  • 2)

    Write two names for each of the following
    (i) Free-living, nitrogen-fixing cyanobacteria.
    (ii) Free-living, aerobic, nitrogen-fixing bacteria
    (iii) Symbiotic, nitrogen-fixing bacteria.

  • 3)

    A section of root nodule of chick-pea plant appears pink
    (i) Name the pigment, responsible for pink colour.
    (ii) What is the role of this pigment in the nodule formation?
    (iii) Explain the process of biological nitrogen-fixation in the root nodules in short.

  • 4)

    Describes nitrification along with the equations and the organisms involved in each step.

  • 5)

    Name the most crucial enzyme found in root nodules for N2-fixation. Does it require a special pink coloured pigment for its functioning? Elaborate.

11th Standard CBSE Biology - Transport in Plants Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What happens when a pressure greater than the atmospheric pressure is applied to pure water or a solution?

  • 2)

    Describe at least three major functions of turgor pressure.

  • 3)

    Under what condition the rate of transpiration will be maximum, when soil is dry and atmosphere is humid or when soil is humid and atmosphere is dry? given reason.

  • 4)

    The movement of water is through transpiration pull'. Discuss if this statement is 100% true. Give explanation for your answer.

  • 5)

    Identify the process occurring in I, II and III.

11th Standard CBSE Biology - Chemical Coordination and Integration Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Mention the major classes of hormones being in humans. Give examples of each

  • 2)

    What is meant by 'antagonistic effect? Illustrate your answer with an example

  • 3)

    How do you justify the statement that hormones of adrenal medulla are emergency hormones?

  • 4)

    Fill up the blank spaces (i) - (vi) in the table given below

    Name of Endocrine Gland Secreted Hormone Functions of the Hormone
    Pituitary (i) Reabsorption of water and electrolytes in the kidney
    (ii) .......... Insulin (iii) .....
    Thymus Thymosins (iv) .....
    Ovary (v) .... and (vi) ..... Development of growing ovarian follicles controls the metabolism of proteins, fats and carbohydrates.
  • 5)

    How does progesterone function in a human female?

CBSE 11th Standard Biology - Anatomy of Flowering Plants Five Mark Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    What is the difference between lenticels and stomata

  • 2)

    What is the commercial source of cork?How is it formed?

  • 3)

    Define the following terms:
    (a) Aestivation
    (b) Placentation
    (c) Actinomorphic
    (d) Zygomorphic
    (e) Superior ovary
    (f) Perigynous flower
    (g) Epipetalous stamen

  • 4)

    Describe modifications of stem with suitable examples.

  • 5)

    What is a flower? Describe the parts of a typical angiosperm flower.

CBSE 11th Standard Biology - Morphology of Flowering Plants Five Mark Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Write the description of gynoecium in various plants.

  • 2)

    Describe the modification of stem with suitable examples. "Tendrils"

  • 3)

    Describe the modification of stem with suitable examples. "Fleshy stems"

  • 4)

    Stolon,offset and rhizome are different forms of stem modification. How can these modifiedforms of stem be distinguished from each other?

  • 5)

    Explain with suitable examples the different types of phyllotaxy.

11th Standard CBSE Biology - Anatomy of Flowering Plants Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Write the characteristics of heartwood and sapwood.

  • 2)

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

  • 3)

    While eating peach or pear, it is usually seen that some stone - like structures get entangled in the teeth, What are these stone-like structures called?

  • 4)

    Explain the formation of vascular cambium.

  • 5)

    Distinguish between sapwood and heartwood .

11th Standard CBSE Biology - Structural Organisation in Animals Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Why is the body cavity of cockroach called haemocoel? Name the different layer of body wall in it.

  • 2)

    Name the main excretory organs of cockroach. Write the structure of these organs.

  • 3)

    Mention the similarities between Cardiac and skeletal muscles.

  • 4)

    Mention the special features of eye in cockroach.

  • 5)

    Difference between keratinised and non keretinised  stratified squamous epitheila

CBSE 11th Standard Biology - Cell: The Unit of Life Three Marks Question Paper - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What are plasmids? Describe their role in bacteria.

  • 2)

    Give the biochemical composition of the plasma membrane.How are lipid molecules arranged in the membrane?

  • 3)

    The lysosomal enzyme does not destroy the cell's own cytoplasm.why?

  • 4)

    State the chief functions of mitochondria.

  • 5)

    In what respect the mitochondria and plastids resemble the bacteria.

11th Standard CBSE Biology - Biomolecules Three Marks Questions - 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
    Explain how this type of inhibition affects the activity of the enzyme

  • 2)

    Find out how much cellulose is made by all the plants in the biosphere and compare it will how much of paper is manufactured by man and hence, what is the consumption of plant material by man annually. What a loss of vegetation?

  • 3)

    Explain the composition of triglyceride.

  • 4)

    Is rubber a primary metabolite or a secondary metabolite? Write four sentence about rubber?

  • 5)

    Differentiate between anabolism and catabolism, along with an example for each.

11th Standard CBSE Biology - Cell Cycle and Cell Division Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Distinguish between anaphase of mitosis and anaphase-I of meiosis are

  • 2)

    Name three phases of interphase. Give one major event of each phase.

  • 3)

    Both unicellular and multicellular organisms undergo mitosis. What are the differences observed in the process between the two.

  • 4)

    (i) Name the stages and type of cell division represented in A and B, repectively.

    (ii) Also explain any one of them.

  • 5)

    Find examples where the four daughter cells from meiosis are equal in size and where they are found unequal in size.

11th CBSE Biology - Animal Kingdom Five Mark Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Which features make mammals as most successful and dominant animals?

  • 2)

    List out various excretory organs in different animals

  • 3)

    Describe briefly the body wall of sponges.

  • 4)

    Differentiate between polyp and medusa

  • 5)

    List any six features of cartilaginous fishes.Give four examples of these.

11th Standard CBSE Biology - Plant Kingdom Five Mark Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Mention the ploidy of the following.
    Protonemel cell of a moss, primary endosperm nucleus in dicot, leaf cell of moss, prothallus of a fern, gemma cell in Marchantia, meristem cell of monocot, ovum of a liverwort and zygote of a fern.

  • 2)

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

  • 3)

    Describe the important characteristics of gymnosperms.

  • 4)

    What is heterospory? Briefly, comment on its significance. Give two examples.

  • 5)

    Name three groups of plants that bear archegonia. Briefly describe the life cycle of anyone of them

11th Standard CBSE - Biology - Biological Classification Five Mark Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    What is the role of methanogens?

  • 2)

    What is the need of a classification system in biology? How did different classification systems develop over a period of time?

  • 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)

    Write difference between ascocarp and basidiocarp

  • 5)

    List any six diseases caused by these classes of fungi

11th CBSE Biology - The Living World Five Mark Question Paper - by Lalitha Devi - Coimbatore - View & Read

  • 1)

    Write a brief note on three domains of life.

  • 2)

    Ria went to see the zoo in her town with her parents and saw many wild animals, their food habits, behavior, etc. She saw that there was a wide variety of animal life in the zoo. But she was amazed to see that the board placed in front of lion cage and monkey place which tells that both were mammals. However, she thought that they were totally different in appearance.
    (i) Why lions and monkeys are considered to be mammals?
    (ii) Explain the scientific reason to maintain a zoological park.
    (iii) Is there any similar place to see a variety of plants? If any, then name some.
    (iv) What values are shown by Ria?

  • 3)

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

  • 4)

    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?

  • 5)

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

11th Standard CBSE Biology - Morphology of Flowering Plants Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

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

  • 2)

    Which structures form gynoecium? How is placenta related to gynoecium? What are its types?

  • 3)

    Differentiate between bract and bractole.

  • 4)

    Name the type of placentation shown in the given figures and give one example of each.

  • 5)

    What is the function of companion cells in phloem?

11th Standard CBSE Biology - Animal Kingdom Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Organ system in different groups of animals exhibits various patterns of complexities. Explain

  • 2)

    How useful  is the study for nature of body cavity and coelom in the classification of animals?

  • 3)

    What are the difficulties that you would face in classification of animals., if common fundamental features are not taken into account?

  • 4)

    Differentiate between notochord and nerve cord

  • 5)

    List out any six general features of cartilaginous fishes

11th Standard CBSE Biology - Plant Kingdom Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    which characters are used in natural system of classification? Explain with examples.

  • 2)

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

  • 3)

    Write a brief account of mosses.

  • 4)

    What is the habitat of ferns. Describe their plant body. Explain the nature of spores ferns have. List out some common ferns.

  • 5)

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

11th Standard CBSE Biology - Biological Classification Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Why slime moulds are called fungus animals?Name some slime moulds

  • 2)

    What obsevable features in Trypanosoma would make you classify it under kingdom-Protista?

  • 3)

    Give the name of hosts of malarial parasite plasmodium

  • 4)

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

  • 5)

    Justify the statement Euglena is a  taxonomic puzzle

11th Standard CBSE Biology Unit 1 The Living World Three Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Why are classification systems changing every now and then?

  • 2)

    What different criteria would you choose to classify people that you meet often?

  • 3)

    Define a taxon. Give some examples of taxa at different hierarchical levels.

  • 4)

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

  • 5)

    In which fields taxonomical aids are helpful? Why taxonomic aids are used in these studies? Which different taxonomical aids are used by the biologists?

11th CBSE Biology - Chemical Coordination and Integration Two Marks Question - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Which hormone is secreated by heart? Mention its role.

  • 2)

    What is the role of second messenger in protein hormone action?

  • 3)

    Explain amplification of a signal in hormone action? What is its role?

  • 4)

    What is meant by 'synergistic effect'? Explain with an example

  • 5)

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

CBSE 11th Biology - Neural Control and Coordination Two Marks Question - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Differentiate between Myelinated and non-Myelinated axons.

  • 2)

    Compare the following "Resting potential and action potential"

  • 3)

    Write a short note on neural coordination.

  • 4)

    Explain the significance of saltatory conduction.

  • 5)

    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

CBSE 11th Biology - Locomotion and Movement Two Marks Question - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What kind of muscle fibers are richly found in the extensor muscles of the back? What characteristics enable these fibres to serve their purpose?

  • 2)

    Why is muscle fibre a syncitium? How are myofilaments arranged in it?

  • 3)

    What are floating ribs? How many of them are there in the human body?

  • 4)

    Give function of a sternum.

  • 5)

    Why do muscles fatigue?

CBSE 11th Biology - Excretory Products and Their Elimination Two Marks Question - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    How does ADH regulate body fluid volume.Explain?

  • 2)

    Describe the role of alcohol and caffeine in the concentration of urine.

  • 3)

    Discuss the regulation of kidney function by the heart.

  • 4)

    State the importance of counter current systems in renal functioning.

  • 5)

    What will happen if the stretch receptors of the urinary bladder wall are totally removed?Explain.

CBSE 11th Biology - Body Fluids and Circulation Two Marks Question - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Mention the causes of high blood pressure.

  • 2)

    Which coronary artery disease is caused due to narrowing of the lumen of arteries?

  • 3)

    Give the reason for reduced blood flow to the heart muscles leading to their death.

  • 4)

    What are two heart sounds? When and how are these sounds produced?

  • 5)

    Explain heart sounds

11th Standard CBSE Biology - Breathing and Exchange of Gases Two Marks Question - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    State the factors affecting the oxygen haemoglobin binding

  • 2)

    What does the oxygen haemoglobin dissociation curve indicate?

  • 3)

    What is the role of carbonic anhydrase in humans?

  • 4)

    Define vital capacity.What is its significance?

  • 5)

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

11th Standard CBSE Biology - Digestion and Absorption Two Marks Question - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

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

  • 2)

    What is the action of salivary amylase?

  • 3)

    What is the location of ileocaecal valve in the alimentary canal of the human? Mention it's role.

  • 4)

    State the role of pancreas in human body. Also mention, what will happen to a person, if the pancreas does not work properly?

  • 5)

    Mention the causative factors for indigestion

11th Standard CBSE Biology - Plant Growth and Development Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Explain inhibitory effect of auxins with the help of one example

  • 2)

    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?

  • 3)

    In an experiment, the callus produced from internodal segments did not proliferate until coconut water was added. Given person

  • 4)

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

  • 5)

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

11th Standard CBSE Biology - Respiration in Plants Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    ATP produced during glycolysis is a result of substrate level phosphorylation.Explain

  • 2)

    What is fermentation?Name any two organic compounds produced in the process.

  • 3)

    What are the main steps in aerobic respiration?Where does it take place?

  • 4)

    Oxygen is critical for aerobic respiration. Explain its role with respect to ETS.

  • 5)

    Where is cytochrome-c located? What is its function?

11th Standard CBSE Biology - Photosynthesis in Higher Plants Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    ATPase enzyme consists of two parts. What are those parts? How are they arranged in the thylakoid membrane? The conformational changes occur in which part of the enzyme?

  • 2)

    What is the basis for designating C3 and C4 pathways of photosynthesis?

  • 3)

    Mention any two reasons, which prove that photosynthesis is essential for sustaining life on the earth.

  • 4)

    Cyanobacteria and some other photosynthetic bacteria do not have chloroplasts.How do they conduct photosynthesis?

  • 5)

    By looking at a plant externally, can you tell whether it is C3 or C4 ? why and how?

11th Standard CBSE Biology - Mineral Nutrition Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Prior to sowing rice, a legume crop is cultivated and ploughed back in the field, why?

  • 2)

    'All elements that are present in a plant need not be essential to its survival'.Comment.

  • 3)

    How is sulphur important for plants?Name the amino acid in which it is present.

  • 4)

    Plants of leguminous family usually contain more amount of protein than other plants? If yes, justify.

  • 5)

    Nitrogen-fixation is shown by prokaryotes and not by eukaryotes. Comment.

11th Standard CBSE Biology - Transport in Plants Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What are the different factors that affect the rate of diffusion?

  • 2)

    What are proteins? what role do they play in diffusion?

  • 3)

    Will the ascent of sap be possible without the cohesion and adhesion of water molecules?Explain.

  • 4)

    Distinguish between exosmosis and endosmosis

  • 5)

    State any two functions of turgor pressure

11th Standard CBSE Biology - Cell Cycle and Cell Division Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What is quiescent stage of cell cycle?

  • 2)

    Why do the chromosomes become short and thick in prophase?

  • 3)

    What is metaphasic plate?

  • 4)

    List the difference between metaphase of mitosis and metaphase-I of meiosis.

  • 5)

    Why is mitosis called equational division?

11th Standard CBSE Biology - Biomolecules Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Proteins have been called 'biological polymers' Explain.

  • 2)

    Arrange the following carbohydrates in the order of increasing complexity of chemical structures - fructose, starch, oligosaccharide, maltose, triose.

  • 3)

    Glycine and alanine are different with respect to one substituent on the \(\alpha -\) carbon. What are the other common substituent groups?

  • 4)

    Name of the product formed by esterification of glycerol with a fatty acid. Also draw its structure.

  • 5)

    What is trihydroxy propane commonly called? Write its structural formula.

11th Standard CBSE Biology - Cell: The Unit of Life Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What is a mesosome in a prokaryotic cell?Mention the functions that it performs.

  • 2)

    What are inclusion bodies in prokaryotic cell?

  • 3)

    What are the main structures within the cell nucleus?

  • 4)

    What are nuclear pores? State their function?

  • 5)

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

11th Standard CBSE Biology - Structural Organisation in Animals Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What is the yellow bone marrow ? what is its function and loction?

  • 2)

    List out the important features of hyaline cartilage.

  • 3)

    Describe the form, size, color, and symmetry of cockroach?

  • 4)

    Explain the term "sclerites"

  • 5)

    Mention the speciual features of eye in cockroach.

CBSE 11th Biology Anatomy of Flowering Plants Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    How the study of anatomy is useful to us ?

  • 2)

    Name those parenchymatous cells which are associated with sieve tube in angiosperms. Mention their roll also

  • 3)

    How does the periderm formation take place in the dicot stems?What are its components?

  • 4)

    Differentiate between pith in dicot root and moncot root.

  • 5)

    Write one differences between mesophyll of dicot leaf and a monocot leaf.

CBSE 11th Biology Morphology of Flowering Plants Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    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?

  • 2)

    Describe the structure of a fruit with the help of a diagram.

  • 3)

    Name of the ornamental plants of lily family 

  • 4)

    Explain the following floral formula and to which it belongs \(Ebr\oplus \quad { K }_{ 2+2 }{ C }_{ 4 }{ A }_{ 2+4 }{ G }_{ (\underset { - }{ 2 } ) }\)

  • 5)

    How will you show the monocarpellary and unilocular condition of gynoecium of Lathrus odoratus (sweet pea)?

11th Standard CBSE Biology - Animal Kingdom Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Difference between the complete and incomplete digestive system.

  • 2)

    Define the terms amphids and phasmids found in Aschelminthes.

  • 3)

    Name a molluscs which has an internal shell and which does not have a shell?

  • 4)

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

  • 5)

    Describe the respiratory system of birds

11th Standard CBSE Biology - Plant Kingdom Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Write few important features of mosses

  • 2)

    Which pteridophyte are useful in nitrogen - fixation and how?

  • 3)

    Give one word answer for following.
    (i) In brown algae, what is the function of frond present?
    (ii) Name the constituents of cell wall in green algae.

  • 4)

    Which gymnosperm provide these items?
    i)Taxol
    ii)Cabada balsam
    iii) Tannius
    iv)Copal

  • 5)

    You are given microsporophyll of gymnosperms and angiosperms without any labeling. How will you differentiate both?

11th CBSE Biology - Biological Classification Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Plants are autotrophic.Can you think of some plants that are partially heterotrophic?

  • 2)

    What are bacteriophages and their types? Identify their shape.

  • 3)

    How do fungi form partnership with most plants?

  • 4)

    How are viroids different from viruses?

  • 5)

    What are the main criteria used for five kingdom system of classification?

11th CBSE Biology The Living World Two Marks Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

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

  • 2)

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

  • 3)

    How are living organisms divided into different taxa? What is the name given to this process?

  • 4)

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

  • 5)

    Why there is a need to standardise the system of naming of living organisms?

CBSE 11th Biology - Chemical Coordination and Integration Book Back Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Hypothalamic hormones : ______________

  • 2)

    Thyrotrophin (TSH) : ______________

  • 3)

    Corticotrophin (ACTH) : _____________

  • 4)

    Gonadotrophins (LH, FSH) : ___________

  • 5)

    Melanotrophin (MSH) : ______________

CBSE 11th Biology - Neural Control and Coordination Book Back Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    The region of the vertebrate eye, where the optic nerve passes out of the retina, is called the

  • 2)

    Name the small tubular gap structure between the two neurons

  • 3)

    What is the nature of nerve impulse?

  • 4)

    Which part of the war determines the pitch of a sound?

  • 5)

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

CBSE 11th Biology - Locomotion and Movement Book Back Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    All mammals (except a few) have_______________________ cervical vertebra.

  • 2)

    The number of phalanges in each limb of human is___________________________

  • 3)

    Thin filament of myofibril contains 2 'F' actins and two other proteins namely_________________ and_________________

  • 4)

    ______________and______________ pairs of ribs are called floating ribs.

  • 5)

    Actin is present in thin filament

CBSE 11th Biology - Excretory Products and Their Elimination Book Back Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Ammonotelism

  • 2)

    Bowman's capsule

  • 3)

    Micturition

  • 4)

    Uricotelism

  • 5)

    ADH

CBSE 11th Biology - Body Fluids and Circulation Book Back Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    Eosinophils

  • 2)

    RBC

  • 3)

    AB Group

  • 4)

    Platelets

  • 5)

    Systole

CBSE 11th Biology - Breathing and Exchange of Gases Book Back Questions - by Jyoti Hirani - Ghorakhal - View & Read

  • 1)

    What is the residual volume of air in a normal human?

  • 2)

    Which of the following is the correct sum for total lung capacity?

  • 3)

    Which centre of the central nervous system is primarily responsible for regulation of respiration?

  • 4)

    What controls the respiratory rhythm in human beings?

  • 5)

    Give the name of some common respiratory disorders

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CBSE Education Study Materials

11th CBSE Biology 2019 - 2020 Academic Syllabus - by Jyoti Hirani - Ghorakhal Aug 21, 2019

Biology 2019 - 2020 Academic Syllabus

Tips to score good marks in CBSE Class 11 Biology - by ADMIN-ENGLISH Jan 23, 2019

It is important that in class 11, students pay attention to what is being taught because it sets ...

Best tips to score 70/70 in CBSE Class 11 Biology - by ADMIN-ENGLISH Jan 23, 2019

Biology is one subject where students need to understand the physiology of all living creatures a...

Best tips to score 70/70 in CBSE Class 11 Biology - by Bala Jan 12, 2019

Biology is one subject where students need to understand the physiology of all living creatures a...

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CBSEStudy Material - Sample Question Papers with Solutions for Class 11 Session 2019 - 2020

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