M.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Second Semester
Botany
MOLECULAR BIOLOGY, EVOLUTION AND CELL
SIGNALING
(CBCS 2014 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Ligase.
2. Ribosome.
3. Mutant.
4. Nucleoside.
5. Phylogeny.
6. Evolution.
7. Biotic components.
8. G protein.
9. Chloroplast.
10. Integrin.
Sub. Code
4MBO2C3
AFF-4900
2
wk14
Part B x 5 25)
Answer all questions choosing either or
11. With suitable diagrams describe the structure of
DNA.
Or
Describe the structure and function of RNA
polymerase.
12. What are the types of mutants? Explain with
examples.
Or
Write brief notes on different response mechanism
in cells.
13. Describe the various isolation mechanisms in
evolution of living organisms.
Or
Comment on gene duplication and divergence and
their significance.
14. What are second messengers? Explain with
examples.
Or
Describe signal transduction mechanism in brief.
15. Write notes on neurotransmission and their
regulations in living organisms.
Or
What are the mechanism of protein insertion and
processing in endoplasmic reticulum?
AFF-4900
3
wk14
Part C x 10 30)
Answer any three questions.
16. Describe in detail the mechanism of transcription with
suitable diagrams.
17. Write detailed notes on different repair mechanisms and
their significances.
18. Explain in detail the different concepts used in evolution.
19. What is cell signaling? Explain the various mechanism of
cell signaling.
20. Explain in detail on cellular communication mechanism.
Add note on its regulation.
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