HCS mains 2009 zoology optional question paper Frontier IAS
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HCS mains 2009 zoology optional question paper Frontier IAS

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HCS

HCS mains 2009 zoology optional question paper

HCS Mains 2009  Zoology  (Code 23) 

Time: 3 Hours                   Maximum Marks: 150

Note: Attempt any five questions. All question carry equal marks. Q No. 1 is compulsory. Answer two questions from Part I and two questions from Part II. The parts of the same questions must be answered together and must not be interposed between answers to other questions.

1.Write critical notes on any four of the following: (4x7.5=30)

(a) Bene?cial insects

(b) Dentition in mammals

(c) Enzyme action

(d) Extra embryonic membranes in chick

(e) Pituitary hormones

(f) Recombination and Linkage

PART - I

2. Discuss parasitic adaptations in helminths. (30)

3. Write an essay on migration in ?shes and birds. (30)

4. 'Pollution leads to global warming'. Comment. (30)

PART- II

5. Describe the processes of transcription and translation in the biosynthesis of proteins. Add a note of the genetic code. (30)

6. De?ne action potential and describe its propagation along the nerve ?bre and across the synapse. (30)

7. Describe the structure of mitochondria, compartmentalization of enzymes and the generation of ATP. (30)