LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – BIO TECHNOLOGY

VE 42

THIRD SEMESTER – April 2009

BT 3813 – ENVIRONMENTAL BIOTECHNOLOGY

 

 

 

Date & Time: 16/04/2009 / 1:00 – 4:00   Dept. No.                                     Max. : 100 Marks

 

 

 

PART – A                                          (20 marks)

Answer ALL the questions                                                                             (5 x 1 = 5 marks)

 

1. Choose the correct answer
2. ___________ operates on the principle of adsorption followed by biodegradation
3. Trickling filter b) Packed bed reactor
4. Fabric reaction d) Rotating Biological contactor
5. The process of aggregation of destabilized particle is called.
6. Flocculation b) sedimentation         c) Coagulation                         d) flotation
7. Addition of a compound that lowers the surface tension
8. Biochealator b)biosurfactant                        c) enzyme        d) electron acceptor
9. The average global temperature is
10. 20^oC b) 14^oC                                    c) 25^oC                        d) 30^oC
11. The bacteria which is dominant in biofilm is
12. Fusarium sp b) Geotrichum sp        c) Achromobacter sp   d) Zoogloea ramigera

 

1. State true or false, if false state reason (5 x 1 = 5)

 

6. Cytochrome P450 complex is involved in the detoxification of xenobiotics.
7. Polyethylene is a biodegradable plastic.
8. Microorganisams present in biofiltration system are predominantly aerobic.
9. Parathion is a chlorinated pesticide used widely.
10. Bioaugmentation is extraction of metals from ores with help of microorganisms.

 

• Complete the following (5 x 1=5)

 

11. _____________ sp is mainly involved in microbial leaching.
12. ____________ an alkaloid isolated from tree frog.
13. ___________ test to detect the potability of drinking water.
14. SCP are rich source of ___________ pigment.
15. _____________ is the process of removal of nitrogen from waste matter.

 

 

 

 

 

1. Answer the following in 50 words each                                                           (5 x 1 = 5)

 

16. Biofuel
17. Sedimentation
18. Landfills
19. Composting
20. Eutrophication

PART – B

 

Answer any FIVE question within 350 words only                                                     (5 x 8 = 40)

 

21. Give an account on air pollution.
22. Write notes on (i) trickling filter (ii) packed bed reactor and add a note on their applications.
23. Define vermicomposting? What are the different methods of composting?
24. Explain about bioremediation of sub surface material.
25. Write details on bioaugmentation.
26. Discuss the biodegradation of chlorinated hydrocarbons.
27. Write n essay on algal hydrocarbons.
28. Explain the mechanism of microbial corrosion with example.

 

PART – C

Answer the following each within 1500 words                                                             (2 x 20 = 40)

 

29. a) What is bioremediation? Explain in detail about in situ and ex situ bioremediation.

 

(OR)

1. Write in detail the different types of reactors used in waste water treatment.

 

30. a) Write a detail account on bio degradation of aromatic xenobiotics.

 

(OR)

1. b) Describe the mechanism of bioleaching.

 

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