St. Joseph’s College of Arts & Science (Autonomous) St. Joseph’s College Road, Cuddalore – 607001 PMB704 – ENVIRONMENTAL MICROBIOLOGY
Time : 3 hrs
Max Marks :75
U
SECTION – A (5X5=25) Answer any FIVE Questions 1. Describe the process of eutrophication in aquatic habitat. 2. Give a short note on waterborne disease. 3. Briefly explain about chemical oxygen demand. 4. How microbial populations enhance the soil fertility? 5. What is biogeochemical cycling? Discuss the sulfur cycle. 6. Explain about antagonistic interaction between microorganisms. 7. Write a notes on biofilm. 8. Write a critical account on biodegradation of industrial waste containing heavy metals. SECTION – B (5X10=50) Answer any FIVE Questions 9. Explain the importance of extrinsic and intrinsic factors in aquatic microbial population.
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Q7/20O/04-12
10. Write a note on factors responsible for airmicroflora and its impact on human health. 11. What are the sources responsible for water pollution? 12. Write on the primary and secondary treatment processes in waste water treatment. 13. Explain the mechanisms involved for bioremediation in contaminated sites. 14. Discuss the green house effect and its impact on microbial diversity. 15. Write detail notes on: a) Rhizosphere
b) Mycorrhizae
16. Write an essay on biofouling and their impacts.
What is biogeochemical cycling? Discuss the sulfur cycle. 6. Explain about antagonistic interaction between microorganisms. 7. Write a notes on biofilm. 8.
a) Mutualism b) Commensalism. d) Antagonism d) Predation. 10. The type of symbiosis in which one organism live in or on another. organism at the expense of ...
Discuss in detail the production of SCP by bacteria. 21. a. Explain the production of protease enzyme by Fungi. (or). b. What is lysine and explain the production ...
If a particular disease occurs only occasionally it is called. a) Sporadic disease b) ... a)Sarfanin b)Crystal violet. c)Methylene blue d)Malachite green. Reg. No ... 21. a) What are the nutritional requirements of microorganisms? (or). b) Explain ..
Ribosomes of eukaryotes are. a) 70S b) 80S c) 90S d) 100S. 6. Pick out the cyanobacterium. a) Nostoc b) Methanobacterium c) Chlorobium d) Chromatium. 7.
