Code -23
ZOOLOGY
Time: 3 Hours
Maximum Marks: 150

Note: Attempt any five questions!._AlI 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 ofthe following: (4x7.5=30)

Beneficial insects


Dentition in mammals


Enzyme action


Extra embryonic membranes in chick


Pituitary hormones


Recombination and Linkage


PART-I
2. Discuss parasitic adaptations in helminths.
3. Write an essay on migration in fishes and birds.
4. 'Pollution leads to global warming'. Comment.
PART-II

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

6.
Define action potential and describe its propagation along the nerve fibre and across the synapse.

7.
Describe the structure of mitochondria, compartmentalization of enzymes and the generation ofATP.


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