UPSC: IAS MAIN - 2007 ( ZOOLOGY )
Paper- II

Time Allowed: Three Hours Maximum Marks: 300

INSTRUCTIONS

Candidates should attempt all questions strictly in accordance with the instructions given under each questions. The number of marks carried by each question is indicated at the end of the question.

SECTION-A

1. Different between any three of the following: - 20x3=60

(a) Coincidence and interference

(b) Mitotic and Meiotic Prophase

(c) Substantive and polymorphic variation

(d) Genera and Species

2. Describe transcription in pro- and eukaryotes. 60

3. Write explanatory notes on the following: - 30x2=60

a). Mobile Genetic Segment

b). Tryptophan Opera

4. Discuss Hardy-Weinberg Law and mention its utility. 60

SECTION-B

5. Explain the importance of any three of the following: - 20x3=60

(a). Structure and function of cyclic AMP

(b). Mechanism of Hormone action

(c). Regeneration

(d). Teratogenesis

6. Discuss active and passive immunity. Mention autoimmune disorders. 60

7. Describe programmed cell death. 60

8. Discuss the role of liver and pancreas in digestion? 60