11th Public Exam Official Question Paper 2019

11th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Biology

Time : 02:30:00 Hrs
Total Marks : 70
    16 x 1 = 16
  1. Vaccination for small pox was discovered by ________________

    (a)

    d' Herelle

    (b)

    Edward Jenner

    (c)

    Robert Gallo

    (d)

    F.W. Twort

  2. Example for negatively geotropic roots

    (a)

    Ipomoea, Dahlia

    (b)

    Asparagus, Ruellia

    (c)

    Vitis, Portulaca

    (d)

    Avicennia, Rhizophora

  3. Single seeded dry fruit developing from single carpel with superior ovary ______________.

    (a)

    Achene

    (b)

    Cypsela

    (c)

    Caryopsis

    (d)

    Nut

  4. ______________________images of structures observed through microscopes can be further magnified.

    (a)

    Cilia

    (b)

    Squash

    (c)

    Microphotograph

    (d)

    Histochemistry

  5. Cladogram considers the following characters

    (a)

    Physiological and Biochemical

    (b)

    Evolutionary and Phylogenetic

    (c)

    Taxonimic and systematic

    (d)

    None of the above

  6. The muscles associated with the heart of insects are

    (a)

    alary

    (b)

    striped

    (c)

    radial

    (d)

    pericazdial

  7. Presence of gills in the tadpole of frog indicates that

    (a)

    fishes were amphibious in the past

    (b)

    fishes involved from frog -like ancestors

    (c)

    frogs will have gills in future

    (d)

    frogs evolved from gilled ancestor

  8. Which of the following substances in tobacco smoke damage the gas exchange system?

    (a)

    carbon monoxide and carcinogens

    (b)

    carbon monoxide and nicotine

    (c)

    carcinogens and tar

    (d)

    nicotine and tar

  9. A person who is on a long hunger strike and is , surviving only on water, will have

    (a)

    Less amino acids in his urine

    (b)

    Macula densa cells

    (c)

    Less urea in his urine

    (d)

    More sodium in his urine

  10. ___________ are involved in olfactory reflexes and emotional responses to odour.

    (a)

    Hypothalamus

    (b)

    Epithalamus

    (c)

    Infundibulum

    (d)

    Mammillary bodies

  11. 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

  12. Pearls were cultured for the first time in India in __________

    (a)

    Kerala

    (b)

    Thoothukudi

    (c)

    Tirunelveli

    (d)

    Rameswaram

  13. Read the following sentences and identify the correctly matched sentences.
    i. In exarch condition, the protoxylem lies outside of metaxylem.
    ii. In endarch condition, the protoxylem lie towords the centre.
    iii. In centarch condition, metaxylem lies in the middle of the protoxylem.
    iv. In mesarch condition, protoxylem lies in the middle of the metaxylem.

    (a)

    i, ii and iii only

    (b)

    ii, iii and iv only

    (c)

    i, ii and iv only

    (d)

    All of these

  14. Experiment with Balsam demonstrates

    (a)

    Translocation of solute

    (b)

    Plasmolysis

    (c)

    Transpiration pull

    (d)

    Ascent of Sap

  15. Red Drop experiment was done using___________.

    (a)

    Plant

    (b)

    Chlorella

    (c)

    Bacteria

    (d)

    Virus

  16. 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
  17. 8 x 2 = 16
  18. What do you infer from the term pycnoxylic?

  19. What is mother axis?

  20. Define magnification. How will you calculate it?

  21. What are pseudocoelomates?

  22. How do earthworms breathe?

  23. What is aneurysm? How much it is dangerous?

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

  25. Name the contractile proteins present in the skeletal muscle

  26. Write the peculiar characters of duck.

  27. Explain Bast fibres?

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

  29. What is Vernalization?

  30. 6 x 3 = 18
  31. How are lichens used? 

  32. Differentiate between aggregate fruit with multiple fruit.

  33. Differentiate nucleoside and nucleotide

  34. Head of cockroach is called hypognathous. Why?

  35. Mention the components of saliva.

  36. Match the following terms.
    (a) \(\alpha \) -receptor                     - Afferent arteriole
    (b) Autoregulation                - Basal lamina
    (c) Bowman's capsule          - Capillary blood pressure
    (d) Capsule fluid pressure    - Colloid osmotic Pressure
    (e) Glomerulus                     - GFR
    (f) Podocyte                         - JG cells
    (g) Vasoconstriction             - Plasma proteins 

  37. Differentiate Aqueous humour and Vitreous humour.

  38. Write the advantages of vermicomposting.

  39. Differentiate Phellem and Phelloderm.

  40. Mention the agricultural role of gibberellic acids?

  41. 4 x 5 = 20
  42. Give a concise account on asexual reproduction in bacteria.

  43. List the ICN principles.

  44. Draw a neat labelled diagram of the digestive system of frog

  45. Explain the recording of electrocardiogram.

  46. What is tubular secretion? Name the substances secreted through the renal tubules.

  47. Briefly explain the structure of thyroid gland.

  48. Describe Crassulacean Acid Metabolism (CAM Cycle)?

  49. Write the physiological effects of Cytokinins.

*****************************************

Reviews & Comments about 11th Standard Biology Public Exam Official Question Paper 2019

Write your Comment