LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – ZOOLOGY

TS 11

FIFTH SEMESTER – APRIL 2006

                                                               ZO 5500 – CELL BIOLOGY

(Also equivalent to ZOO 509)

 

 

Date & Time : 20-04-2006/AFTERNOON   Dept. No.                                                       Max. : 100 Marks

 

 

 

Part A                                     (Answer All)                          10 X 2 = 20

 

1.  Mention the discoverers of the following

(a) Nucleolus               (b) lysosome.

1. What do you mean by resolving power of microscope?
2. Explain the terms micron and angstrom units.
3. State the significance of sedimentation coefficient.
4. What are peroxysomes?
5. Differentiate euchromatin from heterochromatin.
6. What is oxidative phosphorylation?
7. Comment on nucleolar organizer.
8. Distinguish haplosis from meiosis.
9. Give two examples for each

(a) Fixative                  (b) Vital stain.

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

 

1.  Explain the principle involved in electron microscopy.
2. Briefly describe one suitable method for animal cell culture.
3. Write notes on giant chromosomes and illustrate.
4. Elucidate membrane permeability and transport.
5.  With suitable illustrations explain polymorphism in lysosomes.
6.  Highlight the sequential changes in Prophase I of Meiosis.

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

1.  Write an essay on biosynthesis of protein.
2. Discuss cytology of cancer.
3. Explain the colloidal properties of protoplasm.
4. Write notes on (1) Membrane models   (2) Endoplasmic reticulum.

 

 

 

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