LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – ZOOLOGY

TS 23

SECOND SEMESTER – APRIL 2006

                                             ZO 2808 – CELL AND MOLECULAR BIOLOGY

 

 

Date & Time : 19-04-2006/FORENOON     Dept. No.                                                       Max. : 100 Marks

 

 

Part A                                               (Answer All)                                       10 ´ 2 = 20

 

1. Distinguish totipotent from pleuripotent stem cells.
2. How does ER synthesis lecithin?
3. Illustrate fluorescent activated cell sorted.
4. Define mDNA and add its significance.
5. Sketch avian flu H₅N₁
6. Differentiate error free and error prone system of repair.
7. Explain gestational diabetes.
8. What is genetic enhancement?
9. Comment on attenuation?
10. What is De Novo initiation?

Part B                                          (Answer any four)                                   4 ´ 10 = 40

11. How does golgi transport cargo vesicles to lysosome? Illustrate.
12. Illustrate Na⁺ – K⁺ pump being operated across the plasma membrane..
13. State the theories on carcinogenesis.
14. Describe the methods of finger printing.
15. Give an account of ionizing radiations and its characteristics
16. Explain oncogenes and growth factors. Add notes on nuclear oncogenes.

 

Part C                                           (Answer any two)                                   2 ´ 20 = 40

17. Explain the principle, protocol and application of FISH technique.
18. How are chromosomes studied? Propose a protocol. Discuss the role of giant

chromosomes and their significance.

19. Write an essay on DNA repair mechanism.
20. Give an account of Lac Operon of E. coli and positive control.

 

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