MICROBIOLOGY Special Paper – XI,B.Sc. (Part – III) (Semester – V),Solapur University Question Paper,2014 Question Paper

Solapur University Question Paper
B.Sc. (Part – III) (Semester – V) Examination, 2014
MICROBIOLOGY Special Paper – XI
Agricultural Microbiology
Day and Date : Saturday, 12-4-2014 Max. Marks : 50
Time : 3.00 p.m. to 5.00 p.m.
N.B.: 1) All questions are compulsory.
2) Figures to the right indicate full marks.
1. Rewrite the following sentences by selecting correct answer from given
alternatives : 10
i) In nitrogen cycle, the ammonia combines with organic acid and results in the
formation of
a) Glutamic acid b) Glutamine
c) Glucose d) Fructose
ii) ___________ organism is involved in methane oxidation.
a) Methanococcus b) Methanobacter
c) Methylocystis d) All of these
iii) Xanthomonas oxynopoides causes infection called
a) Whip smut of sugarcane b) Oily spot on pomegranate
c) Soft rot of potato d) Curling of leaves in mango
iv) In vermi composting on an average _______ no of adult earthworms are
necessary.
a) 20 b) 200
c) 2000 d) 20,000
Seat
No.
SLR-C – 143 -2-
v) The transformation of complex compounds to simpler compounds by organism
is ________ type of reaction.
a) Diffusion b) Detoxification
c) Activation d) Degradation
vi) _________enzyme oxidize aromatic lignin containing one or two hydroxyl
groups.
a) Oxygenases b) Cellulases
c) Phenol oxidases d) Laccases
vii) The cleavage of phosphorous from organic matter in soil is done by _______
enzyme.
a) Oxidases b) Oxygenases
c) Phosphorylases d) Phosphatases
viii) For satisfactory aerobic composting , the desirable moisture content is _____
%.
a) 80 – 90 b) 70 – 80
c) 40 – 60 d) 10 – 20
ix) Most abundant component of plant cell wall is ___________.
a) Cellulose b) Hemi cellulose
c) Lignin d) Pectin
x) The causative agent of whip smut of sugarcane is _______ organism.
a) Xanthomonas citri b) Xanthomonas oxynopoides
c) Ustilago scitaminea d) All of these
2. Answer any five of the following : 10
i) What is town compost ?
ii) What is nitrification ?
iii) What is vermi compost ?
iv) Write the properties of soil.
v) What is solubilization of phosphorous ?
vi) Define activation reaction in pesticide degradation.
vii) What is denitrification ? Give on example of denitrifying organism.
-3- SLR-C – 143
3. A) Answer the questions in brief (any two) : 6
i) Write in detail different factors governing cellulose biodegradation.
ii) Discuss in detail role of microorganisms in carbon cycle.
iii) Write about biodegradation of aliphatic hydrocarbons.
B) Write about biochemistry of cellulose degardation. 4
4. Answer any two of the following : 10
i) Discuss in detail biodegradation of lignin.
ii) Discuss in detail ‘soil as an ecosystem’.
iii) Explain in short ‘sulfur cycle’.
5. Answer any two of the following : 10
i) Explain in short nitrogen cycle.
ii) Discuss in detail whip smut of sugarcane.
iii) Discuss in brief biodegradation of pesticides.
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