LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

          B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.

KL 45

THIRD SEMESTER – APRIL 2008

VS 323 – BIOCHEMISTRY AND ENVIRONMENTAL BIOTECH.

 

 

 

Date : 05/05/2008                Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART A         (10 x 2 = 20 marks)

 

Answer ALL questions. All questions carry equal marks.

Write short notes on the following each within 50 words.

 

1. Peptidoglycans
2. Signal molecule
3. Active site
4. Repeat sequence
5. Coenzyme
6. Cryopreservation
7. Oxidation pond
8. Bioremediation
9. Insecticidal crystal protein
10. VAM Fungi

PART B (5 x 8 = 40 marks)

 

Answer any FIVE of the following not choosing more than 3 in each section. Each should not exceed 350 word..

SECTION A

 

1. Write notes on bonding patterns present in the DNA.
2. Explain the kinetics of enzyme reaction.
3. Brief out the method of ELISA.
4. How are enzymes classified based on its reactions?

 

SECTION B

1. Explain about activated sludge digestor.
2. Comment on nonrenewable resources.
3. Write notes on bacterial biopesticides.
4. Describe about nitrogenous biofertilizers used in agriculture.

 

PART  C (2 x 20 = 40 marks)

Answer the following not exceeding 1200 words each.

 

1. (a) Write an essay on the various uses of enzymes.

Or

(b) Explain about the classifications of proteins.

 

1. (a) Give a detailed account on sewage wastewater treatment.

Or

(b) Explain in detail about the process of bioleaching in metallurgy.

 

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