M.Sc. (Semester III) (CBCS) Examination Oct/Nov-2017
Environmental Science
ENVIRONMENTAL BIOTECHNOLOGY
Day Date: Saturday, 18-11-2017 Max. Marks: 70
Time: 02.30 PM to 05.00 PM
Instructions: Answer any Five Question.
All Questions carry equal marks.
Question No. 1 is Compulsory.
Attempt any two from Q.No.2, 3 and 4.
Attempt any two from Q.No.5, 6 and 7.
Draw neat and labeled diagrams wherever necessary.
Q.1 Select the answer among the following 14
"Biomagnification" is
Increase in the biotic population of an area
Increase in the size of the individuals of a species due to natural evolution
Process where by harmful chemicals enter and get concentrated in a food
chain
None of the above
Lichen is an example of
Amensalism Commensalism
Symbiosis Parasitism
Immobilization technology can be used
Treatment of effluents Control of pests
Control of bacteria Control of diseases
Nif gene is useful in
Photosynthesis Reproduction
Circulation Nitrogen fixation
The viruses which infect bacteria are
Cyanophages Mycophages
Bacteriophages None of the above
The widely used staining schedule for colouring bacterial cells is
Gram staining Eosin staining
Methylene blue staining None of the above
Metal recovery by microbes involves
Bioremediation Biotransformation
Bioleaching Fermentation
A compound that is foreign in nature to biological system is
Halogenated compound Aromatic compound
Xenobiotic compound None of the above
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SLR-MI-405
Biologically catalyzed reduction in the complexity of chemical compound is

Biosynthesis Bio-degradation
Photosynthesis Respiration
10) In vermin-composting are used to produce compost
Algae Fungi
Bacteria Worms
11) The enzymes that produce internal cuts in DNA molecule are
Lipases Amylases
Peptidases Endonucleases
12) DNA copy of an RNA molecule is produced by enzyme
Ligase Reverse transcriptase
Endonuclease Lipase
13) Freshly isolated animal cell cultures are
Primary cultures Secondary cultures
Cell lines None of the above
14) Most commonly used enzyme for enzymatic disaggregation of cell cultures is

Trypsin Endonuclease
Ligase Reverse transcriptase
Q.2 Give a short account of Genetically modified organisms, highlighting their
applications.
14
Q.3 Explain the significance of Biopesticides. Also, give an example of microbial
biopesticides useful in agricultural field.
14
Q.4 Explain in detail about use of phytoremediation technology for soil
decontamination.
14
Q.5 Write note on: 14
Bioremediation
Carbon sequestration
Q.6 Explain in brief: 14
Scope of environmental biotechnology
Degradation of pesticides
Q.7 Write an account on: 14
Biological filtration process in air environment.
Role of microorganisms in wastewater treatment.