M.Sc. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2017.
Third Semester
Microbiology
Paper III ENVIRONMENTAL MICROBIOLOGY
2 20633 AA
Time 3 Hours Max. Marks 70
SECTION — A
Answer any FIVE questions. 6 30 Marks)
1. Carbon cycle
2. Nitrification
3. Mangroves
4. Food chain
5. Oil slicks
6. Aerobic corrosion
7. Saccharification
8. Composting
SECTION — B
Answer ALL questions. 10 40 Marks)
9. Describe the types of microbial interactions.
Or
Describe the ecological significance of ammonification and denitrification.
10. Describe the microbes and microbial propagules in the air.
Or
Describe sampling and microbial assessment of water quality and water
purification.

11. Describe the fate of engineered microorganisms in the environment.
Or
Write an account on the Biotechnological approach to Biofouling control.
12. Describe the leaching process of Copper and Gold.
Or
Write an account on the treatment of industrial fermentation unit effluents.