HCS zoology optional question paper 2011 Frontier IAS
Baljit Dhaka
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HCS zoology optional question paper 2011 Frontier IAS

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HCS zoology optional question paper 2011

HCS MAINS 2011 ZOOLOGY (Code - 23)

Time - 3 Hours              Maximum Marks - 150


i) Answer ?ve questions in all. Question No. l is compulsory. .

ii) Answer two questions from Part I and two questions from Part II.

iii) The parts of the same question must be answered together and must not be interposed between answers to other questions.

iv) All questions carry equal marks.


1.Write critical notes on any four of the following (4 x 7.5 =30)

(a) Double helix

(b) Digestive enzymes

(c) Multiple alleles

(d) Colouration

(e) Af?nities of Peripatus

(f) Fate maps


Part I

  1. Discuss the aerial adaptation of birds.                                (30)
  2. What are biotic factors? Give an exhaustive account of interspeci?c biotic factors that help in population regulation. (30)
  3. Illustrate the life history of malarial parasite.                      (30)

Part II

  1. Describe the steps in the breakdown of glucose to pyruvate.                                                     (30)
  2. Describe the counter current mechanism of urine formation in man. Add a note on the role of hormones in regulation of urine volume.                                                                                                           (30)
  3. Describe the structure of a nuclear—pore complex and the organisation of chromatin.             (30)