Model Exam Question paper

11th Standard

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Biology

Answer all the questions

Time : 02:30:00 Hrs
Total Marks : 100

    Part A

    30 x 1 = 30
  1. Identify the Archaebacterium

    (a)

    Acetobacter

    (b)

    Erwinia

    (c)

    Treponema

    (d)

    Methanobacterium

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

    (a)

    7

    (b)

    14

    (c)

    42

    (d)

    28

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

    (a)

    Tuberous root

    (b)

    Beaded root

    (c)

    Moniliform root

    (d)

    Nodulose root

  4. In an inflorescence where flowers are borne laterally in an acropetal succession the position of the youngest floral bud shall be

    (a)

    Proximal

    (b)

    Distal

    (c)

    Intercalary

    (d)

    Anywhere

  5. The taxonomy which involves the similarities and dissimilarities among the immune system of different taxa is termed as

    (a)

    Chemotaxonomy

    (b)

    Molecular systematics

    (c)

    Serotaxonomy

    (d)

    Numerical taxonomy

  6. 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

    (a)

    Neither lipid nor proteins can flip-flop

    (b)

    Both lipid and proteins can flip flop

    (c)

    While lipids can rarely flip-flop proteins cannot

    (d)

    While proteins can flip-flop lipids cannot

  7. In meiosis crossing over is initiated at

    (a)

    Diplotene

    (b)

    Pachytene

    (c)

    Leptotene

    (d)

    Zygotene

  8. Proteins perform many physiological functions. For example some functions as enzymes. One of the following represents an additional function that some proteins discharge:

    (a)

    Antibiotics

    (b)

    Pigment conferring colour to skin

    (c)

    Pigments making colours of flowers

    (d)

    Hormones

  9. Which taxonomic aid gives comprehensive information about a taxon?

    (a)

    Taxonomic Key

    (b)

    Herbarium

    (c)

    Flora

    (d)

    Monograph

  10. Sea anemone belongs to phylum

    (a)

    Protozoa

    (b)

    Porifera

    (c)

    Coelenterata

    (d)

    Echinodermata

  11. The main function of the cuboidal epithelium is

    (a)

    Protection

    (b)

    Secretion

    (c)

    Absorption

    (d)

    Both (b) and (c)

  12. Buccopharyngeal respiration in frog

    (a)

    is increased when nostrils are closed

    (b)

    Stops when there is pulmonary respiration

    (c)

    is increased when it is catching fly

    (d)

    stops when mouth is opened.

  13. The sphincter of Oddi guards

    (a)

    Hepatopancreatic duct

    (b)

    Common bile duct

    (c)

    Pancreatic duct

    (d)

    Cystic duct

  14. Absorption of glycerol, fatty acids and monoglycerides takes place by

    (a)

    Lymph vessels within villi

    (b)

    Walls of stomach

    (c)

    Colon

    (d)

    Capillaries within villi

  15. The Tidal Volume of a normal person is

    (a)

    800 mL

    (b)

    1200 mL

    (c)

    500 mL

    (d)

    1100 - 1200 mL

  16. Dub sound of heart is caused by

    (a)

    Closure of atrio-ventricular valves

    (b)

    Opening of semi-lunar valves

    (c)

    Closure of semi -lunar values

    (d)

    Opening of atrio-ventricular valves

  17. The end product of Ornithine cycle is

    (a)

    carbon dioxide

    (b)

    uric acid

    (c)

    urea

    (d)

    ammonia

  18. The protein present in the thick filament is

    (a)

    myosin

    (b)

    actin

    (c)

    pectin

    (d)

    leucin

  19. Examine the diagram of the two cell types A and B given below and select the correct option.

    (a)

    Cell-A is the rod cell found evenly all over retina

    (b)

    Cell-A is the cone cell more concentrated in the fovea centralis

    (c)

    Cell-B is concerned with colour vision in bright light

    (d)

    Cell-A is sensitive to bright light intensities

  20. All of the following are associated with the myelin sheath except

    (a)

    Faster conduction of nerve impulses

    (b)

    Nodes of Ranvier forming gaps along the axon

    (c)

    Increased energy output for nerve impulse conduction

    (d)

    Saltatory conduction of action potential

  21. Which one of the following statement is correct

    (a)

    Calcitonin and thymosin are thyroid hormones

    (b)

    Pepsin and prolactin are secreted in stomach

    (c)

    Secretin and rhodopsin are polypeptide hormones

    (d)

    Cortisol and aldosterone are steroid hormones

  22. Which of the given option shows all wrong statements for thyroid gland.
    (i) It inhibits process of RBC formation
    (ii) It helps in maintenance of water and electrolytes
    (iii) Its more secretion can reduce blood pressure
    (iv) It Stimulates osteoblast

    (a)

    (i) and (ii)

    (b)

    (iii) and (iv)

    (c)

    (i) and (iv)

    (d)

    (i) and (iii)

  23. Inland fisheries are

    (a)

    deep sea fishing

    (b)

    capturing fishes from sea coast

    (c)

    raising and capturing fishes in fresh water

    (d)

    oil extraction from fish

  24. In Gymnosperms, the activity of sieve tubes are controlled by

    (a)

    Nearby sieve tube members

    (b)

    Phloem parenchyma cells

    (c)

    Nucleus of companion cells

    (d)

    Nucleus of albuminous cells.

  25. Consider the following statements:
    In spring season vascular cambium
    i. is less active.
    ii. produces a large number of xylary elements.
    iii. forms vessels with wide cavities of these

    (a)

    (i) is correct but (ii) and (iii) are not correct

    (b)

    (i) is not correct but (ii) and (iii) are correct

    (c)

    (i) and (ii) are correct but (iii) is not correct

    (d)

    (i) and (ii) are not correct but (iii) is correct.

  26. In a fully turgid cell

    (a)

    DPD = 10 atm; OP = 5 atm; TP = 10 atm

    (b)

    DPD = 0 atm; OP = 10 atm; TP = 10 atm

    (c)

    DPD = 0 atm; OP = 5 atm; TP = 10 atm

    (d)

    DPD = 20 atm; OP = 20 atm; TP = 10 atm

  27. If a plant is provided with all mineral nutrients but, Mn concentration is increased, what will be the deficiency?

    (a)

    Mn prevent the uptake of Fe, Mg but not Ca

    (b)

    Mn increase the uptake of Fe, Mg and Ca

    (c)

    Only increase the uptake of Ca

    (d)

    Prevent the uptake Fe, Mg, and Ca

  28. Identify true statement regarding the light reaction of photosynthesis?

    (a)

    Splitting of water molecule is associate with PS I.

    (b)

    PS I and PS II involved in the formation of NDPH + H+

    (c)

    The reaction center of PS I is Chlorophyll a with the absorption peak at 680 nm.

    (d)

    The reaction center of PS II is Chlorophyll a with the absorption peak at 700 nm.

  29. The compound which links glycolysis and Krebs cycle is

    (a)

    succinic acid

    (b)

    pyruvic acid

    (c)

    acetyl CoA

    (d)

    citric acid

  30. 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
    (a)
    A B C D E F
    iii iv v vi i ii
    (b)
    A B C D E F
    v i ii iv vi iii
    (c)
    A B C D E F
    iii v vi i ii iv
    (d)
    A B C D E F
    ii iii v vi iv i
  31. Part B

    10 x 2 = 20
  32. Mention two characters shared by gymnosperms and angiosperms?

  33. State the protoplasm theory.

  34. Why mule is sterile in nature?

  35. List the unique features of bird's endoskeleton.

  36. Name the visual units of the compound eyes of cockroach.

  37. What is the effect of aldosterone on kidneys and where is it produced?

  38. Comment on homeostasis.

  39. Mention the advantages of MOET.

  40. Write the role of nitrogenase enzyme in nitrogen fixation? 

  41. What is Devernalization?

  42. Part C

    10 x 3 = 30
  43. Differentiate between aggregate fruit with multiple fruit.

  44. Differentiate between elastic fibres and elastic connective tissue.

  45. Digestive secretions are secreted only when needed. Discuss.

  46. What are the heart sounds? When and how are these sounds produced?

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

  48. How does an isometric contraction take place?

  49. Label the parts of the neuron.

  50. 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?

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

  52. What is plasticity?

  53. Part D

    4 x 5 = 20
  54. Explain the different methods of asexual reproduction in fungi.

  55. Draw the ultra structure of plant cell

  56. Select the correct biological term
    Lymphocytes, red cells, leucocytes, plasma, erythrocytes, white cells, haemoglobin , phagocyte, platelets, blood clot.
    (a) Disc shaped cells which are concave on both sides.
    (b) Most of these have a large, bilobed nucleus.
    (c) Enable red cells to transport blood.
    (d) The liquid part of the blood.
    (e) Most of them move and change shape like an amoeba.
    (f) Consists of water and important dissolved substances.
    (g) Destroyed in the liver and spleen after circulating in the blood for four months.
    (h) The substances which give red cells their colour .
    (i) Another name for red blood cells
    (j) Blood that has been changed to a jelly
    (k) A word that means cell eater.
    (l) Cells without nucleus .
    (m) White cells made in the lymphatic tissue.
    (n) Blocks wound and prevent excessive bleeding.
    (o) Fragment of cells which are made in the bone marrow.
    (P) Another name for white blood cells.
    (q) Slowly releases oxygen to blood cells.
    (r) Their function is to help blood clot in wounds.

  57. Identify the biological term.
    Homeostasis, excretion, glomerulus, urea, glomerular filtration, ureters, urine, Bowman's capsule, urinary system, reabsorption, micturition, osmosis, glomerular capillaries via efferent arteriole, proteins.
    (a) A liquid which gathers in the bladder.
    (b) Produced when blood is filtered in a Bowman's capsule.
    (c) Temporary storage of urine.
    (d) A ball of inter twined capillaries.
    (e) A process that changes glomerular filtrate into urine.
    (f) Removal of unwanted substances from the body.
    (g) Each contains a glomerulus.
    (h) Carry urine from the kidneys to the bladder.
    (i) Contains urea and many useful substances.
    (j) Blood is filtered through its walls into the Bowman's capsule.
    (k) Scientific term for urination.
    (I) Regulation of water and dissolved substances in blood and tissue fluid.
    (m) Carry urine from the kidneys to the bladder.
    (n) Consists of the kidneys, ureters and bladder.
    (o) Removal of useful substances from glomerular filtrate.
    (p) The process by which water is transported in the proximal convoluted tubule.
    (q) Where has the blood in the capillaries I surrounding the proximal convoluted tubule come from?
    (r) What solute the blood contains that are not present in the glomerular filtrate?

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