DISTANCE EDUCATION
M.Sc. (Zoology) DEGREE EXAMINATION, DECEMBER 2017.
BIOCHEMISTRY AND ANIMAL PHYSIOLOGY
Time Three hours Maximum 100 marks
SECTION A — x 8 40 marks)
Answer any FIVE questions.
All questions carry equal marks.
1. Explain the Watson-Crick model of DNA helix.
2. Write the metabolic significance of hexose
monophosphate shunt.
3. cAMP acts as a second messenger for a majority of
polypeptide hormones Substantiate.
4. Write a short note on the following
Phospholipids
Coricycle
Nephron
Insulin.
5. Classify animals based on the nature of excretory
products.
6. Explain the properties of nerve cell.
7. Describe the origin and propagation of heart beat.
8. Explain the thermoregulatory mechanisms in animals.
Sub. Code
14
DE-3056
2
Ws9
SECTION B — x 15 60 marks)
Answer any FOUR of the following.
All questions carry equal marks.
9. Describe the different types of protein structures.
10. Explain the various reactions of the Kreb's cycle.
11. Explain the role of enzymes in the digestion of
carbohydrates, proteins and lipids.
12. Describe the physiological mechanism of muscle
contraction.
13. Write an account of Osmoregulation in fishes.
14. Explain the transport mechanism of respiratory gases.
15. Write an essay on Rhythmic phenomena and biological
clocks in animals.
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