11th Biology - Full Portion Five Marks Question Paper - by 8682895000 - View & Read

• 1)

  Give a general account on lichens.

• 2)

  What is the difference between a Zoo and Wild Life Sanctuary

• 3)

  Can we use recent molecular tools to identify and classify organisms

• 4)

  What are the components of blood in frog?

• 5)

  Write short note on Absorption and Assimalation.

11th Biology - Full Portion Three Marks Question Paper - by 8682895000 - View & Read

• 1)

  Briefly discuss on five kingdom classification, Add a note on merits and demerits.

• 2)

  Differentiate between aggregate fruit with multiple fruit.

• 3)

  Write about the radial symmetry with suitable diagram.

• 4)

  Name any four important functions of epithelial tissue and provide at least one example of a tissue that exemplifies each function.

• 5)

  Distinguish between Neurons and Neuroglia

11th Biology - Full Portion Two Marks Question Paper - by 8682895000 - View & Read

• 1)

  Write the distinguishing features of Monera.

• 2)

  Mention two characters shared by gymnosperms and angiosperms?

• 3)

  How root climbers differ from stem climber?

• 4)

  Find out the floral formula for a bisexual flower with bract, regular, pentamerous, distinct calyx and corolla, superior ovary without bracteole.

• 5)

  Bring out the significance of phase contrast microscopy.

11th Biology - Revision Model Question Paper 2 - by Banu - Tiruvallur - View & Read

• 1)

  PHB means:

• 2)

  Rolling or folding of individual leaves is called_____________

• 3)

  What is the habit of Xanthorrhoea?

• 4)

  Sequences of which of the following is used to know the phylogeny

• 5)

  A living organism is differentiated from non- living structure based on

11th Biology - Public Exam Model Question Paper 2019 - 2020 - by Banu - Tiruvallur - View & Read

• 1)

  Father of Indian Mycology ________.

• 2)

  Plants that grows completely under water are called as ____________type of aquatic plants.

• 3)

  What is the leaf of Zorniadiphyliain Fabaceae?

• 4)

  Keeping in view the fluid mosaic model for the structure of cell membrane, which one of the following statements is correct with respect to the movement of lipid and proteins from one lipid monolayer to the other

• 5)

  Which taxonomic aid gives comprehensive information about a taxon?

11th Biology - Tissue Level of Organisation Model Question Paper - by Banu - Tiruvallur - View & Read

• 1)

  Name the disease in which the person finds it difficult to remember recent events and has mood swings

• 2)

  The Goblet cells are modifications of________________

• 3)

  -------is closely attached to skeletal bones.

• 4)

  The cartilage cells are called

• 5)

  Skin is:

11th Biology - Kingdom Animalia Model Question Paper - by Banu - Tiruvallur - View & Read

• 1)

  _____________show anadromous migration.

• 2)

  For the first time development of four-chambered heart is seen in______________

• 3)

  Hibernation and aestivation are seen in______________

• 4)

  SACON is located in____________

• 5)

  ________ are the organs of balance in Arthropods.

11th Biology - Biomolecules Model Question Paper - by Banu - Tiruvallur - View & Read

• 1)

  Sanger first sequenced the protein called ____________.

• 2)

  The activity of salivary amylase is increased in the presence _________ of ions.

• 3)

  The middle lamella is made up of ___________.

• 4)

  Find out the mismatched pairs:

• 5)

  Which are the structural units of DNA?

11th Biology - Cell Cycle Model Question Paper - by Banu - Tiruvallur - View & Read

• 1)

  Polytene Chromosomes are formed by ______

• 2)

  The period between two successive cell divisions is called

• 3)

  What is synthesized during G₂ - phase?

• 4)

  The separation of two chomatids of each chromosome during early anaphase is initiated by:

• 5)

  Significance of meiosis is associated with :

11th Biology - Cell The Unit of Life Model Question Paper - by Banu - Tiruvallur - View & Read

• 1)

  The term protoplasm was coined by______.

• 2)

  Choose the group that belongs to Mesokaryotes.

• 3)

  Digestion of cell organelles by the cell is called_____

• 4)

  Who proposed the cell theory_________.

• 5)

  It possess Flagella

11th Biology - Taxonomy and Systematic Botany Model Question Paper - by Banu - Tiruvallur - View & Read

• 1)

  Phylogenetic classification is the most favoured classification because it reflects

• 2)

  Flowers are zygomorphic in

• 3)

  ............. is the lowest rank of classification.

• 4)

  Plantae is a ................

• 5)

  Binomial system of nomenclature was introduced by ...........

11th Biology - Reproductive Morphology Model Question Paper - by Banu - Tiruvallur - View & Read

• 1)

  Gynoecium with united carpels is termed as

• 2)

  A true fruit is the one where

• 3)

  Cymule means __________

• 4)

  The inflorescence in Euphorbia is a ____________

• 5)

  Persistent calyx is seen in ______________

11th Biology - Vegetative Morphology Model Question Paper - by Banu - Tiruvallur - View & Read

• 1)

  Curcuma amada, Curcuma domestica, Asparagus, Maranta are example of

• 2)

  Bryophyllum and Dioscorea are example for

• 3)

  _____ is a biennial.

• 4)

  The root in Dahlia is described as ___

• 5)

  Ternate phyllotaxy is seen in _____

11th Biology - Plant Kingdom Important Questions - by Banu - Tiruvallur - View & Read

• 1)

  Which of the plant group has gametophyte as a dominant phase?

• 2)

  Which of following represent generation in pteridophytes?

• 3)

  The haploid number of chromosome for an Angiosperm is 14, the number of chromosome in its endosperm would be

• 4)

  Endosperm in Gymnosperm is formed

• 5)

  Stone wort refers to _____

11th Biology - Living World Important Questions - by Banu - Tiruvallur - View & Read

• 1)

  Identify the correctly matched pair

• 2)

  A plant growth promoter got from fungi is ___________

• 3)

  ___________ are considered as pollution indicators.

• 4)

  Sum total of constructive reactions is called as _____________

• 5)

  Increase in body mass is considered as ____________

11th Biology - Half Yearly Model Question Paper 2019 - by Banu - Tiruvallur - View & Read

• 1)

  Which of following represent generation in pteridophytes?

• 2)

  Which of the following is a flowering plant with nodules containing filamentous nitrogen fixing micro-organisms?

• 3)

  Benda named as____________________________​​​​​​

• 4)

  ____________ is called as reduction division.

• 5)

  Which reinforces the structure of the cell membrane in animal cells?

11th Standard Biology - Zoology - Basic Medical Instruments and Techniques Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  Name the device used to hear the internal sounds of the human body.

• 2)

  What is the ratio of blood dilution for WBC cell counting under 10 X objective of the microscope?

• 3)

  Diluting fluid used for total WBC count is ____________

• 4)

  Normally, the heart beats ___________ times a minute when we are at rest.

• 5)

  When the heart beat is too high it is called __________

11th Standard Biology - Term II Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  Which one of the following statement about virus is correct?

• 2)

  The haploid number of chromosome for an Angiosperm is 14, the number of chromosome in its endosperm would be

• 3)

  Gynoecium with united carpels is termed as

• 4)

  Sequences of which of the following is used to know the phylogeny

• 5)

  If mitotic division is restricted in G1 phase of the cell cycle then the condition is known as

11th Standard Biology - Botany - Photosynthesis Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  Which chlorophyll molecule does not have a phytol tail?

• 2)

  For every CO₂ molecule entering the C₃ cycle, the number of ATP & NADPH required

• 3)

  A plant growing in a tree as epiphyte accumulates malic acid in dark and cells contains large storage vacuoles. Identify the of type of pathway that takes place in this plant.

• 4)

  Energy needed for ATP synthesis in PS II comes from____________.

• 5)

  Kranz anatomy is one ofthe characteristics of the leaves of

11th Biology - Botany - Mineral Nutrition Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  Which chelating agent found in soil are produced by bacteria?

• 2)

  Leghaemoglobin is

• 3)

  Plants deficient of element zinc, shows its effect on the biosynthesis of plant growth hormone

• 4)

  Minerals that play an important role for activation of enzymes involved in respiration.

• 5)

  The macro nutrient which is an essential component of all organic compounds yet not obtained by plants from soil is

11th Standard Bio - Botany - Respiration Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  The number of ATP molecules formed by complete oxidation of one molecule of pyruvic acid is

• 2)

  The compound which links glycolysis and Krebs cycle is

• 3)

  In Pulses RQ will be

• 4)

  Succinate dehydrogenase enzyme is found in mitochondrial

• 5)

  The number of O₂ molecules required for breaking down of one molecule of glucose forglycolysis.

11th Standard Bio - Botany - Plant Growth and Development Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  If the diameter of the pulley is 6 inches, length of the pointer is 10 inches and distance travelled by pointer is 5 inches. Calculate the actual growth in length of plant.

• 2)

  Seed dormancy allows the plants to

• 3)

  Which hormone is maximum in coconut milk?

• 4)

  Testing of any chemical substance by using living system is called

• 5)

  Kurosawa found plants suffering from Bakanae disease. This led to discovery of ................

11th Zoology - Neural Control and Coordination Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Sam's optometrist tells him that his intraocular pressure is high. What is this condition called and which fluid does it involve?

• 2)

  Pleasant smell of food urged Ravi to rush into the kitchen. Name the parts of the brain involved in the identification of food and emotional responses to odour.

• 3)

  At the end of repolarization, the nerve membrane gets hyperpolarized. Why?

• 4)

  Label the parts of the neuron.
  

• 5)

  The choroid plexus secretes cerebrospinal fluid. List the function of it.

11th Zoology - Chemical Coordination and Integration Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Hormones are known as chemical messenger. Justify.

• 2)

  Comment on Acini of thyroid gland

• 3)

  Write the symptoms of cretinism

• 4)

  Growth hormone is important for normal growth. Justify the statement.

• 5)

  Pineal gland is an endocrine gland; write its role

11th Zoology - Trends in Economic Zoology Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Write the advantages of vermicomposting.

• 2)

  What are the main duties of a worker bee?

• 3)

  What are the Nutritive values of fishes?

• 4)

  Give the economic importance of prawn fishery

• 5)

  Give the economic importance of lac insect

11th Botany - Tissue and Tissue System Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  How are meristems classified based on position?

• 2)

  Draw a diagram of stomata and label the parts.

• 3)

  What are Casparian strips?

• 4)

  Write a few sentences about vascular bundle of a Monocot stem.

• 5)

  Differentiate the features of Monocot and Dicot leaf.

11th Botany - Secondary Growth Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  A timber merchant bought 2 logs of wood from a forest & named them A & B, The log A was 50 year old & B was 20 years old. Which log of wood will last longer for the merchant? Why?

• 2)

  A cross section of tree trunk contains 60 lighter and 60 darker rings. Determine the age of the tree and justify.

• 3)

  What is amber?

• 4)

  Write the differences between vascular cambium and cork cambium?

• 5)

  How are barks classified?

11th Standard Botany - Transport in Plants Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Write the role of pressure potential, turgor: pressure and wall pressure for turgidity of plant: cell.

• 2)

  Explain the application of exosmosis in food preservation.

• 3)

  What are the steps involved in phloem loading?

• 4)

  What is the principle of reverse osmosis?

• 5)

  Define Osmosis

11th Botany - Mineral Nutrition Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  The nitrogen is present in the atmosphere in huge amount but higher plants fail to utilize it. Why?

• 2)

  Why is that in certain plants deficiency symptoms appear first in younger parts of the plants while in others, they do so in mature organs?

• 3)

  Explain the insectivorous mode of nutrition in angiosperms?

• 4)

  List the criteria for essential minerals.

• 5)

  Give the deficiency symptoms of copper in plants.

11th Botany - Photosynthesis Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Grasses have an adaptive mechanism to compensate photorespiratory losses- Name and describe the mechanism.

• 2)

  What is the significance of photosynthesis?

• 3)

  Draw the structure of chloroplast and label two parts.

• 4)

  How is chlorophyll a synthesized?

• 5)

  Write a note an Xanthophylls.

11th Botany - Respiration Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  What are enzymes involved in phosphorylation and dephosphorylation reactions in EMP pathway?

• 2)

  What is the significance of RQ?

• 3)

  What is the aim of Kuhne's experiment?

• 4)

  What is salt respiration?

• 5)

  What are the industrial uses of alcoholic fermentation?

11th Botany - Plant Growth and Development Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  What is plasticity?

• 2)

  What is sigmoid curve? Mention their phases

• 3)

  Write the internal factors for condition of growth.

• 4)

  Name the plant growth regulators?

• 5)

  Mention the agricultural role of gibberellic acids?

11th Standard Biology - Bio - Botany - Transport in Plants Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  In a fully turgid cell

• 2)

  What type of transpiration is possible in the xerophyte Opuntia?

• 3)

  Stomata of a plant open due to

• 4)

  Munch hypothesis is based on

• 5)

  Which of the following physical force is responsibl for ascent of sap?

11th Standard Biology - Bio - Botany - Secondary Growth Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  The common bottle cork is a product of

• 2)

  What is the fate of primary xylem in a dicot root showing extensive secondary growth?

• 3)

  The wood formed in spring season in called ____________

• 4)

  Living part of the wood is called __________

• 5)

  Gymnosperm wood is known as _______________

11th Standard Zoology - Locomotion and Movement Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  How does an isotonic contraction take place?

• 2)

  Distinguish Red muscle fibres and white muscle fibres.

• 3)

  Name the regions of the vertebral column and the number of vertebrae present in them

• 4)

  What are the functions of the vertebral column?

• 5)

  What are Cartilaginous joints

11th Zoology - Excretion Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Name the three filtration barriers that solutes must come across as they move from plasma to the lumen of Bowman's capsule. What components of the blood are usually excluded by these layers?

• 2)

  What forces promote glomerular filtration? What forces opposes them? What is meant by net filtration pressure?

• 3)

  When a molecule or ion is reabsorbed from the lumen of the nephron, where does it go? If a solute is filtered and not reabsorbed from the tubule, where does it go?

• 4)

  Match each of the following substances. with its mode of transportation in proximal tubular reabsorption.
  (a) Na+               -     Simple diffusion       
  (b) Glucose        -     Primary active transport 
  (c) Urea              -     Indirect active transport
  (d) Plasma          -     Paracellular movement
  (e) Proteins         -     Facilitated diffusion
  (f) Water             -      Endocytosis

• 5)

  Which segment is the site of secretion and regulated reabsorption of ions and pH homeostasis?

11th Zoology - Body Fluids and Circulation Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Which of these functions could or could not be carried out by a red blood cell? Briefly justify your answer.
  a. Protein synthesis
  b. Cell division
  c. Lipid synthesis
  d. Active transport

• 2)

  Distinguish between arteries and veins.

• 3)

  Distinguish between open and closed circulation

• 4)

  What might be the effect on a person whose diet has less iron content?

• 5)

  What is lymph? Write its function.

11th Zoology - Respiration Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  How the body makes long-term adjustments when living in high altitude.

• 2)

  Why is pneumonia considered a dangerous disease?

• 3)

  What are occupational respiratory disorders?

• 4)

  Draw the human respiration system and label any 4 parts.

• 5)

  Draw an oxygen dissociation curve.

11th Zoology - Digestion and Absorption Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Bile juice contains no digestive enzymes, yet it is important for digestion. Why?

• 2)

  List the chemical changes that starch molecule undergoes from the time it reaches the small intestine.

• 3)

  How do proteins differ from fats in their energy value and their role in the body?

• 4)

  Digestive secretions are secreted only when needed. Discuss.

• 5)

  Givea simple test for protein.

11th Zoology - Organ and Organ Systems in Animals Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Write the types of respiration seen in frog.

• 2)

  Differentiate between peristomium and prostomium in earthworm.

• 3)

  Give the location of clitellum and spermathecal openings in Lampito mauritii.

• 4)

  Differentiate between tergum and a sternum.

• 5)

  Head of cockroach is called hypognathous. Why?

11th Zoology - Tissue Level of Organisation Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Differentiate between elastic fibres and elastic connective tissue.

• 2)

  Name any four important functions of epithelial tissue and provide at least one example of a tissue that exemplifies each function.

• 3)

  Explain Gap Junctions.

• 4)

  What is tissue fluid?

• 5)

  Distinguish Bone and Cartilage.

11th Zoology - Kingdom Animalia Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Compare Schizocoelom with enterocoelom.

• 2)

  Concept Mapping - Use the following terms to create a concept map that shows the major characteristic features of the phylum nematode: Roundworms, pseudocoelomates, digestive tract, cuticle, parasite, sexual dimorphism.

• 3)

  List the characteristic features that distinguish cartilaginous fishes with living jawless fishes.

• 4)

  What is metagenesis?

• 5)

  What are comb Jellies or sea walnuts

11th Zoology - Living World Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  List any five salient features of the family Felidae.

• 2)

  What is systematics?

• 3)

  What are extremophiles?

• 4)

  What is the Significance of Bhupathy's purple frog?

• 5)

  Why are sparrows listed as endangered species?

11th Standard Biology - Botany - Tissue and Tissue System Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  In Gymnosperms, the activity of sieve tubes are controlled by

• 2)

  Grafting is successful in dicots but not in monocots because the dicots have

• 3)

  Identify the correctly matched pair.

• 4)

  In a vertical section of a typical dicot leaf, the phloem in the mid-vein is situated

• 5)

  Ground tissue includes

11th Standard Biology - Zoology - Trends in Economic Zoology Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  Which one of the following is not related to vermiculture?
  (a) Maintains soil fertility
  (b) Breakdown of inorganic matter
  (c) Gives porosity, aeration and moisture holding capacity
  (d) Degradation of non-biodegradable solid waste

• 2)

  Silk is obtained from ________

• 3)

  Rearing of honey bee is called

• 4)

  Prawn belongs to the class

• 5)

  Choose the correctly matched pair

11th Standard Botany - Taxonomy and Systematic Botany Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  What is the role of national gardens in conserving biodiversity? - Discuss.

• 2)

  What is the need for cladistics?

• 3)

  Draw the floral diagram and write the floral formula of Clitoria ternatea

• 4)

  Draw the floral diagram and write the floral formula of Pisum sativum

• 5)

  Give the systematic position of Solanaceae.

11th Standard Botany - Biomolecules Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  What is mRNA?

• 2)

  Differentiate Prokaryotic mRNA and Eukaryotic mRNA?

• 3)

  What is Inulin?

• 4)

  What is Agar?

• 5)

  Explain Polysaccharide with an example.

11th Standard Botany - Vegetative Morphology Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Differentiate Simple and Compound leaf.

• 2)

  Draw the regions of the root and label them.

• 3)

  Draw a leaf and label the parts.

• 4)

  Differentiate between reticulate venation and parallel venation

• 5)

  How is pinnately compound leaf different from a palmately compound leaf.

11th Standard Botany - Cell - The Unit of Life Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Distinguish between prokaryotes and eukaryotes.

• 2)

  What is Glyoxysomes?

• 3)

  Name the four sites in plant cells where ribosomes are seen.

• 4)

  List out the function of cell wall

• 5)

  What is solation and gelation?

11th Standard Botany - Plant Kingdom Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Do you think shape of chloroplast is unique for algae? Justify your answer.

• 2)

  List out any three Economic importance of algae.

• 3)

  Describe the Vegetable reproduction of non-vascular cryptogams.

• 4)

  What are the three types of sexual reproduction occur in algae?

• 5)

  Describe the structure of pteridophytes.

11th Standard Botany - Reproductive Morphology Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  How are simple fruits classified?

• 2)

  Differentiate Dicot and Monocot seed.

• 3)

  Mention any three functions of seeds.

• 4)

  Write a note on Special Inflorescence.

• 5)

  write a note on Flower sex.

11th Standard Botany - Cell Cycle Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Differentiate between mitosis and meiosis

• 2)

  Given an account of G₀ phase.

• 3)

  
  Which is the stage where replication takes place?

• 4)

  Tabulate the time duration in hours of the different phases of cell cycle

• 5)

  Explain G₁ phase of cell cycle.

11th Botany - Living World Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Briefly discuss on five kingdom classification, Add a note on merits and demerits.

• 2)

  List out the bacteria used in Dairy industry.

• 3)

  What is Fimbriae or Pili?

• 4)

  List out the Animal diseases caused by Bacteria.

• 5)

  What are Gram-Negative bacteria?

11th Standard Biology - Zoology - Chemical Coordination and Integration Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  The maintenance of constant internal environment is referred as

• 2)

  Serum calcium level is regulated by

• 3)

  Which of the following gland is related with immunity?

• 4)

  Hypersecretion of GH in children leads to

• 5)

  ADH refers to_________________

11th Standard Biology - Zoology - Neural Control and Coordination Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  Which structure in the ear converts pressure waves to action potentials?

• 2)

  During synaptic transmission of nerve impulse, the neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q.

• 3)

  Which part of the human brain is concerned with the regulation of body temperature?

• 4)

  The abundant intracellular cation is

• 5)

  All of the following are associated with the myelin sheath except

11th Zoology - Excretion Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  What is the nitrogenous waste produced by amphibian larvae and by the adult animal?

• 2)

  Differentiate cortical from medullary nephrons

• 3)

  What vessels carry blood to the kidneys? Is this blood arterial or venous?

• 4)

  Which vessels drain filtered blood from the kidneys?

• 5)

  Name the three main hormones that are involved in the regulation of the renal function?

Class 11th Zoology - Locomotion and Movement Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Name the filaments present in the sarcomere.

• 2)

  Name the contractile proteins present in the skeletal muscle

• 3)

  Which is the only jointless bone in human body?

• 4)

  How is tetany caused?

• 5)

  How is rigor mortis happened?

Class 11th Zoology - Neural Control and Coordination Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Why is the blind spot called so?

• 2)

  Why are we getting running nose while crying?

• 3)

  The action potential occurs in response to a threshold stimulus; but not at subthreshold stimuli. What is the name of the principle involved?

• 4)

  Cornea transplant in humans is almost never rejected. State the reason.

• 5)

  Name the meninges.

11th Standard - Zoology - Chemical Coordination and Integration Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Comment on homeostasis.

• 2)

  Write the role of oestrogen in ovulation.

• 3)

  Specify the symptoms of acromegaly

• 4)

  Write the functions of CCK.

• 5)

  Name the anatomical layers of pituitary gland

11th Standard - Zoology - Trends in Economic Zoology Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Name the three castes in a honey bee colony

• 2)

  Name the following.
  1. The largest bee in the colony.
  2. The kind of flight which the new virgin queen takes along with the drones out of the hive.

• 3)

  Name any two trees on which lac insect grows.

• 4)

  Mention the advantages of MOET.

• 5)

  Write the peculiar characters of duck.

11th Standard Botany - Tissue and Tissue System Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Why the cells of sclerenchyma and tracheids become dead?

• 2)

  Give examples of fruits which have sclereids

• 3)

  What is special about Gnetum.

• 4)

  What are albuminous cells?

• 5)

  Explain Bast fibres?

11th Standard Botany - Secondary Growth Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  In a forest, if the bark of a tree is damaged by the horn of a deer, How will the plant overcome the damage?

• 2)

  In which season the vessels of angiosperms are larger in size, why?

• 3)

  Central part of the wood is always dark. Why?

• 4)

  Differentiate Porous or Hard wood and Non porous or Soft wood ?

• 5)

  What are pseudo or false annual rings?

Class 11th Botany - Transport in Plants Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  If the concentration of salt in the soil is too high and the plants may wilt even if the field is thoroughly irrigated. Explain

• 2)

  How phosphorylase enzyme open the stomata in starch sugar interconversion theory?

• 3)

  List out the non-photosynthetic parts of a plant that needs a supply of sucrose?

• 4)

  Differentiate channel protein and carrier protein.

• 5)

  What is facilitated diffusion?

11th Standard Botany - Mineral Nutrition Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Plant A in a nutrient medium shows whiptail disease plant B in a nutrient medium shows a little leaf disease. Identify mineral deficiency of plant A and B?

• 2)

  Write the role of nitrogenase enzyme in nitrogen fixation? 

• 3)

  Can the deficiency diseases be transmitted from one plant to another?

• 4)

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

• 5)

  Give examples of Actively mobile minerals

11th Standard Botany - Photosynthesis Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Two groups (A & B) of bean plants of similar size and same leaf area were placed in identical conditions. Group A was exposed to the light of wavelength 400-450nm & Group B to the light of the wavelength of 500- 550nm. Compare the photosynthetic rate of the 2 groups giving reasons.

• 2)

  A tree is believed to be releasing oxygen during night time. Do you believe the truthfulness of this statement? Justify your answer by giving reasons?

• 3)

  When there is plenty of light and the higher concentration of O₂, what kind of pathway does the plant undergo? Analyse the reasons.

• 4)

  What is non-oxygenic photosynthesis?

• 5)

  What are Quantasomes?

11th Botany - Respiration Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Respiratory quotient is zero in succulent plants. Why?

• 2)

  Which pathway of respiration is common in all living organisms? Where does it occur inside the cell and what are the products?

• 3)

  Explain the RQ of respiratory substrates in case of anaerobic respiration.

• 4)

  We find it difficult to breathe at night under a tree? Why?

• 5)

  How did Blackman classify respiration?

11th Botany - Plant Growth and Development Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  What are the parameters used to measure growth of plants?

• 2)

  Mention the phases of growth in plants?

• 3)

  Name any two synthetic auxins?

• 4)

  How does ABA show Antagonistic effect?

• 5)

  What is a florigen?

11th Zoology - Body Fluids and Circulation Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Distinguish between mitral valve and semi lunar valve.

• 2)

  Right ventricular wall is thinner than the left ventricular wall Why

• 3)

  Name the different types of extracellular fluids in our body.

• 4)

  Name the two opposing pressures which helps in formation of tissue fluid.

• 5)

  Name the two sources of blood supply to the liver.

11th Zoology - Respiration Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Name the respiratory organs of flatworm, earthworm, fish, prawn, cockroach and cat.

• 2)

  Name the enzyme that catalyses the bicarbonate formation in RBCs.

• 3)

  Air moving from the nose to the trachea passes through a number of structures. List in order of the structures.

• 4)

  Which structure seals the larynx when we swallow?

• 5)

  Resistance in the airways is typically low. Why? Give two reasons.

11th Zoology - Digestion and Absorption Three Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Why are villi present in the intestine and not in the stomach?

• 2)

  What is epiglottis?

• 3)

  What does GERD stand for? What is it commonly known as?

• 4)

  What is succus entericus?

• 5)

  Name the salivary glands.

11th Zoology - Organ and Organ Systems in Animals Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  What are earthworm casts?

• 2)

  Why do you call cockroach a pest?

• 3)

  Name the visual units of the compound eyes of cockroach.

• 4)

  What is the significance of prostate glands in earthworm?

• 5)

  What is direct development?

11th Zoology - Tissue Level of Organisation Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Some epithelia are pseudostratified. What does this mean?

• 2)

  Differentiate white adipose tissue from brown adipose tissue.

• 3)

  Why blood is considered as a typical connective tissue?

• 4)

  Name two auto immune connective tissue disorders.

• 5)

  How are muscles classified?

11th Standard Biology - Bio - Zoology - Locomotion and Movement Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  Muscles are derived from

• 2)

  The pigment present in the muscle fibre to store oxygen is

• 3)

  The region between two successive Z-discs is called a

• 4)

  Inflammation of [oiqts due to accumulation of uric acid crystals is called as

• 5)

  The pointed portion of the elbow is

11th Zoology - Kingdom Animalia Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  What are the four characteristics common to most animals

• 2)

  Compare closed and open circulatory system.

• 3)

  Choose the term that does not belong in the following group and explain why it does not belong? Notochord, cephalisation, dorsal nerve cord and radial symmetry.

• 4)

  What are flame cells?

• 5)

  What is Pseudocoel?

11th Zoology - Living World Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Differentiate between probiotics and pathogenic bacteria

• 2)

  Why mule is sterile in nature?

• 3)

  What is biodiversity?

• 4)

  Define Taxonomy.

• 5)

  How did Aristotle classify animals?

11th Biology - Bio - Zoology - Excretion Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  Concentration of urine depends upon which part of the nephron

• 2)

  The end product of Ornithine cycle is

• 3)

  Podocytes are the cells present on the

• 4)

  Kidney stones are produced due to deposition of uric acid and

• 5)

  Malpighian tubules remove excretory products from

11th Botany - Biomolecules Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Given below is the diagrammatic representation of one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown & one blank component" X" in it.
  

  CATEGORY	COMPOUND
  Cholesterol	Guanine
  Amino acid	NH2
  Nucleotide	Adenine
  Nucleoside	Uracil

• 2)

  Distinguish between nitrogenous base and a base found in inorganic chemistry.

• 3)

  What is a prosthetic group?

• 4)

  What is meant by activation energy?

• 5)

  Distinguish between Reducing sugars and Nonreducing sugars.

11th Botany - Cell Cycle Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Write any three significance of mitosis.

• 2)

  Who coined the word "Cell" and "protoplasm"?

• 3)

  Mentions any two roles of nucleus.

• 4)

  Define the term haploid.

• 5)

  Define the term Cytokinesis

11th Standard Botany - Cell - The Unit of Life Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Bring out the significance of phase contrast microscopy.

• 2)

  State the protoplasm theory.

• 3)

  What is a Telomere?

• 4)

  What is Holocentric Chromosomes?

• 5)

  What are nucleolar organisers?

11th Botany - Taxonomy and Systematic Botany Two Marks Questions - by Banu - Tiruvallur - View & Read

• 1)

  Where will you place the plants which contain two cotyledons with cup shaped thalamus?

• 2)

  Define Taxonomy.

• 3)

  What is ICBN?

• 4)

  What is the other name for serotaxonomy?

• 5)

  Name the different molecular markers used in Molecular taxonomy.

11th Biology - Term 1 Model Question Paper - by Priya - Dindigul - View & Read

• 1)

  Which of following represent generation in pteridophytes?

• 2)

  Example for negatively geotropic roots

• 3)

  Gynoecium with united carpels is termed as

• 4)

  Flowers are zygomorphic in

• 5)

  The correct sequence in cell cycle is

11th Botany - Reproductive Morphology Two Marks Question - by Banu - Tiruvallur - View & Read

• 1)

  Find out the floral formula for a bisexual flower with bract, regular, pentamerous, distinct calyx and corolla, superior ovary without bracteole.

• 2)

  Give the technical terms for the following:
  (a) A sterile stamen
  (b) Stamens are united in one bunch
  (c) Stamens are attached to the petals

• 3)

  What is Coenanthium?

• 4)

  What is dehiscence?

• 5)

  What is a bisexual flower?

11th Standard Botany - Vegetative Morphology Two Marks Question - by Banu - Tiruvallur - View & Read

• 1)

  How root climbers differ from stem climber?

• 2)

  Compare sympodial branching with monopodial branching.

• 3)

  What is primary root?

• 4)

  Define Root cap.

• 5)

  Name the various regions of the root.

11th Standard Botany - Plant Kingdom Two Marks Question - by Banu - Tiruvallur - View & Read

• 1)

  What is plectostele? Give example.

• 2)

  What do you infer from the term pycnoxylic?

• 3)

  Mention two characters shared by gymnosperms and angiosperms?

• 4)

  Name the methods of asexual reproduction seen in algae.

• 5)

  Name a foliaceous alga and colonial non motile alga.

11th Standard Botany - Living World Two Marks Question - by Banu - Tiruvallur - View & Read

• 1)

  Differentiate Homoiomerous and Heteromerous lichens.

• 2)

  Write the distinguishing features of Monera.

• 3)

  Why do farmers plant leguminous crops in crop rotations/mixed cropping?

• 4)

  What is Homeostasis?

• 5)

  How was the word virus derived?

11th Biology - Term 1 Five Mark Model Question Paper - by Banu - Tiruvallur - View & Read

• 1)

  Give a general account on lichens.

• 2)

  Explain the different types of fleshy fruit with suitable example.

• 3)

  Difference between plant and animal cell.

• 4)

  Write about Pachytene and Diplotene of Prophase I.

• 5)

  Write the characteristic features of DNA.

11th Biology Quarterly Model Question Paper - by Banu - Tiruvallur - View & Read

• 1)

  Which one of the following statement about virus is correct?

• 2)

  Identify the incorrect statement about the Gram positive bacteria

• 3)

  ___________ are considered as pollution indicators.

• 4)

  A multicellular organism grows by ____________

• 5)

  ______________ is a basic unit of life.

11th Standard Botany - Plant Growth and Development Book Back Questions - by Banu - Tiruvallur - View & Read

• 1)

  Select the wrong statement from the following:

• 2)

  If the diameter of the pulley is 6 inches, length of the pointer is 10 inches and distance travelled by pointer is 5 inches. Calculate the actual growth in length of plant.

• 3)

  In unisexual plants, sex can be changed by the application of

• 4)

  Select the correctly matched one

  A) Human urine	i) Auxin –B
  B) Corn gram oil	ii) GA3
  C) Fungus	iii) Abscisic acid II
  D) Herring fish sperm	iv) Kinitin
  E) Unripe maize grains	v) Auxin A
  F) Young cotton bolls	vi) Zeatin

• 5)

  Seed dormancy allows the plants to

11th Botany - Respiration Book Back Questions - by Banu - Tiruvallur - View & Read

• 1)

  Respiratory quotient is zero in succulent plants. Why?

• 2)

  What are enzymes involved in phosphorylation and dephosphorylation reactions in EMP pathway?

• 3)

  Explain the reactions taking place in the mitochondrial inner membrane.

• 4)

  How will you calculate net products of one sucrose molecule upon complete oxidation during aerobic respiration as per recent view?

11th Botany - Photosynthesis Book Back Questions - by Banu - Tiruvallur - View & Read

• 1)

  Assertion (A): Increase in Proton gradient inside lumen responsible for ATP synthesis
  Reason (R): Oxygen-evolving complex of PS I located on thylakoid membrane facing Stroma, releases H⁺ ions

• 2)

  The correct sequence of flow of electrons in the light reaction is

• 3)

  Identify true statement regarding the light reaction of photosynthesis?

• 4)

  Two groups (A & B) of bean plants of similar size and same leaf area were placed in identical conditions. Group A was exposed to the light of wavelength 400-450nm & Group B to the light of the wavelength of 500- 550nm. Compare the photosynthetic rate of the 2 groups giving reasons.

• 5)

  When there is plenty of light and the higher concentration of O₂, what kind of pathway does the plant undergo? Analyse the reasons.

11th Botany - Mineral Nutrition Book Back Questions - by Banu - Tiruvallur - View & Read

• 1)

  The element which is not remobilized?

• 2)

  Identify the correct statement
  i. Sulphur is essential for amino acids Cystine and Methionine. 
  ii. Low level of N, K, S and Mo affect the cell division. 
  iii. Non-leguminous plant Alnuswhich contain bacterium Frankia. 
  iv. Denitrification carried out by nitrosomonas and nitrobacter.

• 3)

  Write the role of nitrogenase enzyme in nitrogen fixation? 

• 4)

  The nitrogen is present in the atmosphere in huge amount but higher plants fail to utilize it. Why?

• 5)

  Explain the insectivorous mode of nutrition in angiosperms?

11th Botany - Transport in Plants Book Back Questions - by Banu - Tiruvallur - View & Read

• 1)

  Munch hypothesis is based on

• 2)

  How phosphorylase enzyme open the stomata in starch sugar interconversion theory?

• 3)

  List out the non-photosynthetic parts of a plant that needs a supply of sucrose?

• 4)

  What are the parameters which control water potential?

• 5)

  An artificial cell made of selectively permeable membrane immersed in a beaker (in the figure). Read the values and answer the following questions?
  
  a. Draw an arrow to indicate the direction of water movement.
  b. Is the solution outside the cell isotonic, hypotonic or hypertonic?
  c. Is the cell isotonic, hypotonic or hypertonic?
  d. Will the cell become more flaccid, more turgid or stay in original size?
  e. With reference to artificial cell state, the process is endosmosis or exosmosis? Give reasons

11th Botany - Secondary Growth Book Back Questions - by Banu - Tiruvallur - View & Read

• 1)

  Usually, the monocotyledons do not increase their girth, because

• 2)

  The common bottle cork is a product of

• 3)

  What is the fate of primary xylem in a dicot root showing extensive secondary growth?

• 4)

  In which season the vessels of angiosperms are larger in size, why?

• 5)

  A transverse section of the trunk of a tree shows concentric rings which are known as growth rings. How are these rings formed? What is the significance of these rings?

11th Standard Botany - Tissue and Tissue System Book Back Questions - by Banu - Tiruvallur - View & Read

• 1)

  In Gymnosperms, the activity of sieve tubes are controlled by

• 2)

  When a leaf trace extends from a vascular bundle in a dicot stem, what would be the arrangement of vascular tissues in the veins of the leaf?

• 3)

  Grafting is successful in dicots but not in monocots because the dicots have

• 4)

  Why the cells of sclerenchyma and tracheids become dead?

• 5)

  What are sieve tubes ?explain.

11th Standard Zoology - Trends in Economic Zoology Book Back Questions - by Banu - Tiruvallur - View & Read

• 1)

  Silk is obtained from ________

• 2)

  Rearing of honey bee is called

• 3)

  Prawn belongs to the class

• 4)

  Inland fisheries are

• 5)

  Choose the correctly matched pair

11th Standard Zoology - Chemical Coordination and Integration Book Back Questions - by Banu - Tiruvallur - View & Read

• 1)

  The maintenance of constant internal environment is referred as

• 2)

  Which of the following gland is related with immunity?

• 3)

  Hypersecretion of GH in children leads to

• 4)

  Which one of the following statement is correct

• 5)

  Comment on homeostasis.

11th Standard Zoology - Neural Control and Coordination Book Back Questions - by Banu - Tiruvallur - View & Read

• 1)

  Which structure in the ear converts pressure waves to action potentials?

• 2)

  During synaptic transmission of nerve impulse, the neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q.

• 3)

  Assertion: The imbalance in concentration of Na⁺, K⁺ and proteins generates action potential.
  Reason: To maintain the unequal distribution of Na⁺ and K⁺, the neurons use electrical energy.

• 4)

  Which of the following statement concerning the somatic division of the peripheral neural system is incorrect?

• 5)

  Why is the blind spot called so?

11th Zoology - Locomotion and Movement Book Back Questions - by Banu - Tiruvallur - View & Read

• 1)

  Muscles are derived from

• 2)

  The pigment present in the muscle fibre to store oxygen is

• 3)

  The protein present in the thick filament is

• 4)

  ATPase enzyme needed for muscle contraction is located in

• 5)

  The pointed portion of the elbow is

11th Standard Zoology - Excretion Book Back Questions - by Banu - Tiruvallur - View & Read

• 1)

  Concentration of urine depends upon which part of the nephron

• 2)

  The end product of Ornithine cycle is

• 3)

  Kidney stones are produced due to deposition of uric acid and

• 4)

  Malpighian tubules remove excretory products from

• 5)

  Differentiate cortical from medullary nephrons

TN 11th Standard Biology Official Model Question Paper 2019 - 2020 - by Banu - Tiruvallur - View & Read