LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION - BIO TECHNOLOGY
THIRD SEMESTER – November 2008
ED 32
BT 3813 - ENVIRONMENTAL BIOTECHNOLOGY
Date : 05-11-08
Time : 9:00 - 12:00
Dept. No.
Max. : 100 Marks
PART – A
(20Marks)
Answer all the questions
(5X1=5)
I Choose the correct answer
1.
One of the following is not a gas of green house effect
a)carbondioxide b)CFC
c)hydrogen
d)methane.
2
The bacteria which is dominant in the process of bio leaching
a)Fusarium sp.
b)Geotrichum sp. c)Achromobacter sp. d)Thiobacillus .sp.
3.
Lignolytic enzymes from microbes include
a)Phenoloxidases b)Laccases
c)Peroxidases d)all the above.
4.
The normal size of the flocs in activated sludge are
a)50-200 m
b)10-50 m
c)50-2000 m
5.
d)none
Addition of bacterial cultures to the contaminated medium is called
a) Bioaugmentation b) biostimulation c)bioventing d)bioattenuation
II State true or false, if false state reason.
6.
Polyhydroxybutyrate is a synthetic polymer.
7.
Potable water is chlorinated to make water free from microbes.
8.
Monoxygenase introduces oxygen molecule into the xenobiotic substrate.
9.
Activated sludge process is an anaerobic process.
10.
Methane gas burns with a blue flame.
III.Complete the following.
11.
Compounds which persist in the environment are called -------------------.
12.
--------------------sp are involved in the production of biofuels.
13.
------------------- is the process of recovering metals from ores.
14.
-------------------- method implies the use of earthworms in bioremediation.
15.
Cellulose was degraded to glucose through cellobiose by -------------- enzymes.
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(5x1=5)
(5x1=5)
IV.Answer the following in 50 words each
16. What is the use of Co-substrate?
17. Define Biofilm.
18. Mention a few uses of Biogas.
19. What are Oxidation ponds?
20. Mention a few Greenhouse gases and its impact on global warming.
(5x1=5)
PART - B
Answer any five questions each within 350 words only
(5x8=40)
21.
Explain on the production of biogas from waste.
22.
Write a note on activated sludge process.
23.
Describe the different methods of cultivation of Spirulina.
24.
Write short note on environmental modification of co-substrates.
25.
Define the term acid rain and discuss its effects.
26.
Describe the biological method used in the removal if nitrogen from the sewage.
27.
Write a note on pesticide degradation.
28.
Explain the mechanism of microbial corrosion with examples.
.
Part - C
Answer the following each within 1500 words.
(2 X 20 = 40 marks)
29
a).Describe in detail the various stages of sewage treatment.
(OR)
b).Explain degradation of hydrocarbons by microbes.
30.
a).Explain in detail about treatment of industrial effluents .
(OR)
b).What are the effects of air and water pollution and add a note on its remedial
measures.
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