LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034  B.Sc. DEGREE EXAMINATION – ZOOLOGY

AF 09

FIFTH SEMESTER – NOV 2006

         ZO 5500 – CELL BIOLOGY

(Also equivalent to ZOO 509)

 

 

Date & Time : 25-10-2006/9.00-12.00         Dept. No.                                                       Max. : 100 Marks

 

 

 

SECTION –A

 

I.Answer in a few sentences    ( 10 x 2=20 marks)

 

1. Define numerical aperture and resolving power.

2.What is autoradiography ?

3. Compare Prokaryotic and Eukaryotic ribosomes
4. Mention an initiation codon and terminate codon.
5. What is vital staining ? Cite two examples.
6. Illustrate the ultra structure of cilium or flagellum .

7.Sketch any one model of nucleopore complex.

8. What are histones ? Mention their significance.
9. Draw a cell cycle and mention the role of each phase.
10. Expand: MTOC and ETS.

 

SECTION –B

 

II Briefly Answer any FOUR of the following   (4 x 10 =40 Marks)  

 

11. Explain the principle and application of electrophoresis.
12. Highlight the significance of oil immersion and phase contrast microscope.
13. Outline the significance of Mosaic Membrane model.
14. Illustrate the intra cellular digestion and polymorphic forms of lysosome.
15. Explain the process of DNA replication.

16.Enumerate the characteristics of cancer cells.

 

SECTION –C

 

III. Write any TWO  Detailed  answer  (2 x 20  = 40 Marks)

 

17.Expalin the principle and protocol of  cell fractionation and  ultra centrifugation.

18. How are mRNA codons are translated into amino acids or proteins during

translation.

19. Give an account on Chromosomes and Giant Chromosomes.
20. Highlight the mechanism of mitotic cell division.

 

 

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