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 questions from Q.No.2,3,and 4.
Attempt any two short note questions from Q.No.5,6 and 7.
Draw neat and labeled diagrams wherever necessary.
Q.1 Fill in the blanks. 14
Methamoglobinimia is caused by the drinking water contamination with

Phosphate Mercury
Cadmium Nitrate
In relation to the bacterium's optimal growth requirements, which group
would you except to be MOST likely involved in decomposition of
compost piles?
Acidophilic Psychrophilic
Halophilic Thermophilic
The concept of putting microbes to help clean up the environment is

Pasterurisation Bioremediation
Fermentation Biolistics
Which of the following does not employ bacteria?
Oxidation pond Trickling filter
Contact aerators Rotating Biological Contractors
Activated Sludge Treatment Process involves microbes in the growth
phase
Stationary phase Log phase
Lag phase Death phase
The filtering medium of trickling filters is located with microbial flora,
known as
Zoological film Geological film
Zoological film None of these
Which of the following is generally not referred to the sewerage system?
Sanitary sewers Storm sewers
Combined sewers Solid sewers
Page 2 of 2
SLR-MI-401
A dense bacterial population caught in a tangled web of fibers sticking to
a surface describes
Coagulation A bio disc
A bio film The membrane filter technique
Drinking water testing relies on the detection of certain indicator
organisms known as
Acid-fast bacteria Bacteroids
Coliforms Dinoflagellates
10) The process of extracting metals from oil bearing rocks is called

Bioextraction Microbial extraction
Biofilteration Bioleaching
11) Chlorella species is widely used in the removal of
Organic waste Heavy Metals
Pesticides Hydrocarbons
12) is an example of fungal biopesticides.
Trichoderma sp. B. Thuringiensis
E. coil None of the above
13) The removal of Nitrate from waste water helps to prevent
Biomagnifications Atrophication
Eutrophication None of the above
14) Transgenic
Of the third generation
New variety
Incorporation of new DNA into germ line
None of the above
Q.2 Give an account on genetically modified with their applications in
environment.
14
Q.3 What is Biomethylation? How microbes can be useful in treating polluted
soils? Explain.
14
Q.4 Explain the different microbial methods used for wastewater treatment. 14
Q.5 Write a short notes on following: 14
Degradation of xenobiotic compounds.
Biomonitoring of water.
Q.6 Explain in brief. 14
Carbon sequestration.
Microbial growth.
Q.7 Write an account on. 14
Phytoremediation
Bioleaching