http://avxhome.se/blogs/Torries

(b) Energy is saved because glycolysis and the citric acid

cycle shuts down.

(c) Pyruvate is converted to lactic acid by anaerobic

fermentation.

(d) The energy of respiration is converted into heat.

47. Which of the following conditions correctly describes the
    manner of determining the sex in the given example?
    (a) Homozygous sex chromosome XX produces male in
    Drosophila.
    (b) XO type of sex determines male sex in grasshopper.
    (c) Homozygous sex chromosome ZZ determines female sex
    in birds.
    (d) XO condition in humans as found in Klinefelter’s
    syndrome determines female sex.


48. Natural killer lymphocytes are an example for
    (a) physical barrier (b) cytokine barrier
    (c) cellular barrier (d) physiological barrier.


49. The codon AUG has dual function. It is an initiation codon
    and also codes for
    (a) phenylalanine (b) formaldehyde
    (c) serine (d) methionine.


50. Identify the wrong statement.
    (a) Alleles b and c also produce sugar.
    (b) Alleles IA and IB produce sugars.
    (c) When IB and b or i are present only IB is expressed.
    (d) Both IA and IB are present together and they express
    because of co-dominance.


51. Continued self pollination results in
    (a) formation of unisexual flowers
    (b) inbreeding depression
    (c) gametes loose vigour
    (d) self incompatibility.


52. Which vector can clone a small fragment of DNA?
    (a) Plasmid
    (b) Bacterial artificial chromosome
    (c) Cosmid
    (d) yeast artificial chromosome


53. Seeds without fertilisation are obtained from
    (a) polyembryony (b) parthenocarpy
    (c) dormancy (d) apomixis.


54. With respect to Eichhornia:
    Statement X : It drains off oxygen from water and is seen
    growing in standing water.

Statement Y : It is an indigenous species of our country.

(a) Only statement X is correct and y is wrong.

(b) Both statements X and y are correct.

(c) Only statement y is correct and X is wrong.

(d) Both statements X and y are wrong.

55. Identify the Phylum X.
    ANIMALIA

TISSSUE GRADE

BILATERAL

ACOELOMATE

X

(a) Hemichordata (b) Aschelminthes

(c) Platyhelminthes (d) Ctenophora

56. During sewage treatment biogas produced includes
    (a) hydrogen sulphide, nitrogen, methane
    (b) methane, oxygen, hydrogen sulphide
    (c) methane, hydrogen sulphide, carbon dioxide
    (d) hydrogen sulphide, methane, sulphur oxide.


57. The ancestors of modern day frogs and salamanders are
    (a) Icthyophis (b) jawless fish
    (c) Amphioxus (d) Coelacanth.


58. Hisardale is obtained by crossing
    (a) horse with donkey
    (b) Merino ewes with Bikaneri rams
    (c) superior bull with superior cow
    (d) Bikaneri ewes with Merino rams.


59. The nitrogen base found only in DNA is also called
    (a) uracil (b) 5-methyl uracil
    (c) guanine (d) NH 4 Cl.


60. The hormone which acts on Sertoli cells and stimulates the
    process of spermiogenesis is
    (a) GnRH (b) androgen
    (c) FSH (d) lH.
    Answer Key


61. (a) 2. (b) 3. (c) 4. (c) 5. (b)


62. (a) 7. (d) 8. (c) 9. (d) 10. (a)


63. (a) 12. (d) 13. (b) 14. (d) 15. (d)


64. (a) 17. (d) 18. (b,d) 19. (a) 20. (a)


65. (b) 22. (b) 23. (c) 24. (c) 25. (a)


66. (d) 27. (b) 28. (c) 29. (b) 30. (b)


67. (c) 32. (d) 33. (a) 34. (a) 35. (b)


68. (a) 37. (b) 38. (b) 39. (a) 40. (c)


69. (c) 42. (d) 43. (b) 44. (b) 45. (a)


70. (d) 47. (b) 48. (c) 49. (d) 50. (a)


71. (b) 52. (a) 53. (d) 54. (a) 55. (None)


72. (c) 57. (d) 58. (d) 59. (b) 60. (c)
    


73. Pollen Mother Cell (PMC) Pg. 52


74. Synergid Pg. 57


75. Nereis Pg. 66


76. Nymph Pg. 74


77. Clitellum Pg. 76

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