LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600

IB 49

B.Sc. DEGREE  SEMESTER EXAMINATION – PLANT BIO. &  BIO TECH.

APRIL 2007

 

VS 220 – CYTOGENETICS

 

 

 

Date & Time : 02/05/2007 / 1:00 – 4:00       Dept. No.                                                      Max. : 100 Marks

 

 

Part A  (10 x 2 = 20)

 

Write short notes on the following:

1. Unit membrane
2. Secondary metabolites
3. Elementary particles
4. Crossing over
5. Nucleosome
6. Klein felters syndrome
7. Frame shift mutation
8. Competent cell
9. Prophage
10. Hardy-Weinberg equilibrium

 

Part B (5 x 8 = 40)

 

Answer any FIVE of the following, not exceeding 350 words each. Draw necessary diagrams.

 

1. Enumerate the differences between prokaryotic and an eukaryotic cell.
2. Write notes on Fluid Mosaic model of cell membrane.
3. Describe the ultra structure of chloroplast.
4. Write briefly on cell differentiation in plants.
5. Discuss the chemical composition of nucleus.
6. Explain on semi-conservative DNA replication type.
7. Briefly explain lambrush chromosomes.
8. Give the details on various steps in the process of transduction.

 

Part – C  (2 x 20 = 40)

 

Answer the following in not more than 1500 words. Draw necessary diagrams.

 

1. (a) Illustrate and explain the various stages of meiosis I.

Or

(b) Describe in detail the ultra structure and functions of mitochondria.

 

1. (a) Write details on chromosomal theory of inheritance.

Or

(b) Explain the mechanisms of conjugation in bacteria.

 

 

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