M.Sc. DEGREE EXAMINATION, APRIL 2018
Second Semester
Botany
FUNDAMENTAL PROCESSES, CELL
COMMUNICATION AND CELL SIGNALING
(CBCS 2017 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 X 2 20)
Answer all questions.
1. What is the role of RNA polymerase?
2. List down any two enzymes involved in DNA replication.
3. Comment on sigma factor.
4. What is meant by 'proof reading'?
5. Define signal transduction.
6. What are second messengers? Give an example.
7. Distinguish between innate and adaptive immunity.
8. Highlight the significance of monoclonal antibodies.
9. Explain hyper sensitivity reaction.
10. What are vaccines? Give an example.
Sub. Code
7MBO2C3
AFS-0602
2
WS4
Part B X 5 25)
Answer all questions, choosing either or
11. Discuss the mechanism of DNA replication.
Or
Trace the steps involved in initiation of
transcription.
12. Explain the salient features of the genetic code.
Or
Describe the role of chromatin in gene expression.
13. Discuss the general principles of cell
communication.
Or
Analyse the role of G-proteins in signal
transduction.
14. Describe the structure and function of antibody
molecules.
Or
Write a brief account on antibody engineering.
15. Give an account on cell mediated immunity.
Or
Explain the immune response during bacterial
infection.
AFS-0602
3
WS4
Part C X 10 30)
Answer any three questions.
16. Discuss the types of DNA damage and repair mechanism.
17. Write an essay on post translational modifications.
18. Write an essay on light signaling in plants.
19. Discuss in detail the antigen-antibody interactions.
20. Write notes on congenital and acquired immuno
deficiencies in humans.
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