LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – BIO TECHNOLOGY
IB 08
THIRD SEMESTER – APRIL 2007
BT 3813 - ENVIRONMENTAL BIOTECHNOLOGY
Date & Time: 30/04/2007 / 9:00 - 12:00
Dept. No.
PART – A
Answer all the Questions
I.
1.
2.
3.
4.
5.
II.
6.
7.
8.
9.
10.
III.
11.
12.
13.
14.
15.
Choose the best answer :
Max. : 100 Marks
(20 Marks)
( 5 x 1 = 5)
_______ is used in the extraction of gold.
a) Aspergillus oryzae
b) Pseudomonas aeruginosa
c) Aspergillus niger
d) Pseudomonas putida
________ is the process of aggregating destabilized particles
a) flocculation b) coagulation
c) sedimentation
d) none of the above
The process of removing volatile organic compounds from air using microbes is
a) Biosorption
b) Biofiltration
c) Biotransformation
d) Bioaccumulation
Biofilms are characterized by the presence of extracellular polymers called
a) glycoprotein
b) muco protein
c) glycocalyx
d) glycolipid.
_________ is the break down of a compound which is not used as carbon source by
a) co-metabolism b) mineralisation c) detoxification
d)gratuitous metabolism
Say True or False, if false state reason
(5 x 1 = 5)
Desulfovibrio is a sulphate reducing bacteria
Cyt P450 mono oxygenase incorporate O2 molecule into the substrate.
Potable water is chlorinated to make water free from microbes.
Land filling is used for the final disposal of sludge.
Rhodospirillum sp. can produce hydrogen from organic waste.
Complete the following
(5 x 1 = 5)
Compounds which persist in the environment are called __________
___________ is the extraction or solubilization of mineral from its ores.
Excess growth of algae in waste water which leads to oxygen depletion is called ________
__________enzyme converts benzene to catechol
_________ is produced when O2 is dissociated by solar ultra violet radiations.
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IV. Define the following
16.
17.
18.
19.
20.
( 5 x 1 = 5)
BOD
Biofiltration.
Bioaugmentation
Biocorrosion.
Biodegradation.
PART - B
Answer any 5 questions each within in 350 words only
21.
22.
23.
24.
25.
26.
27.
28.
(5 x 8 = 40)
Describe the production of biogas.
Explain biological nitrogen and phosphorus removal.
Discuss the biodegradation of a) herbicide b) Pesticide
Write an account on microbial plastics.
Describe the bioleaching of copper and Uranium.
Enumerate the mechanisms adopted by the microbes for heavy metal tolerance.
Explain the production biohydrogen.
Write an essay on composting.
PART - C
Answer each of the following, within 1500 words
(2 x 20 = 40)
29.
Define Bioremediation .Explain in detail insitu and exsitu bioremediation.
OR
Discuss in detail the source, cause and consequences of air pollution.
30.
Explain degradation of petroleum hydrocarbons by microbes
OR
Discuss the secondary treatment of sewage water.
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