M.Sc. DEGREE EXAMINATION, NOVEMBER 2017.
Third Semester
Botany
PLANT BIOTECHNOLOGY
(CBCS 2016 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Necleosides.
2. Spliceosome.
3. Plastid.
4. Second Messenger.
5. Leghaemoglobin.
6. Nod gene.
7. Octopine.
8. T-DNA.
9. Viroids.
10. Golden rice.
Sub. Code
525302
RW-870
2
Ws9
Part B 5 25)
Answer all questions, choosing either or
11. Describe the functions of RNA polymerases.
Or
Describe the processing of tRNA.
12. Explain the structure and function of chloroplast
DNA.
Or
Write a note on functions of mitochondrial DNA.
13. Describe the mechanism of plant in response to
abiotic stress.
Or
Explain the role of ethylene in fruit ripening.
14. Write about the virulence regions in Ti-plasmid.
Or
Explain the transfer mechanism of T-DNA into
plant genome.
15. Write a short note on DNA viruses.
Or
Write notes on the vectors used for gene transfer.
RW-870
3
Ws9
Part C x 10 30)
Answer any three questions.
16. Write an essay on organization of chromatin with neat
diagrams.
17. Give an account on organization and functions of
chloroplast.
18. Explain the process of biological nitrogen fixation in
plants.
19. Explain the role of Agrobacterium in plant genetic
engineering.
20. Explain the methods of direct transformation in plants.
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