M.Sc. Microbiology (Semester-IV) NEW (CBCS) Examination, 2017
AGRICULTURAL MICROBIOLOGY
Day Date: Monday, 24-04-2017 Max. Marks: 70
Time: 02.30 PM to 05.00 PM
Instructions Part-I, Q.1 is compulsory.
Attempt any four questions from Part-II
Figures to the right indicates marks.
Answers to the Part-I Part-II should be written
in same answer book.
PART-I
Q.1 Rewrite the following sentences by selecting correct
answer from given alternatives.
14
The conversion of molecular nitrogen into ammonia is known
as …………….
Ammonification Nitrogen Fixation D
Denitrification Nitrate reduction.
Mycorrhiza is symbiotic association between the roots of
plant and ………….
Algae Bacteria I
Fungi Viruses
Clay soil have …………… water holding capacity.
Strong Zero I
Low Medium
……………… is an example of sulfur oxidizing bacteria.
Rhizobium Azotobacter I
Pseudomonas Thiobacillus.
Nodules of legumes are distinctly red in colour because of
presence of……………..
Leghemoglobin Nitrogenase R
Rhizophore Ammonia.
In tissue culture technique………….is used for surface
sterilization of starting material.
NaCl Hcl I
NaoH Hgcl2
Page 2 of 3
……….. is used to control insect pests as bioinsecticide.
Pseudomonas E-coli I
Salmonella B-thuriengiensis
In soil …… Is dominant substance as a chemical component.
Silicon dioxide Phosphorous I
Sulfur Nitrogen
In plants…………..is acts as metal activator for enzymes.
Boron Zinc I
Sodium Chlorine
10) ……..is common nitrogen fixer in paddy fields.
Rhizobium Frankia I
Azospirillum Azotobacters
11) Iron sulphides and manganese oxides gives …… colour
to the soil.
Black Red I
Yellow Green
12) ……… is the product of compositing using various
species of worms
Green manure Chemical fertilizer I
Biofertilizer Vermicompost
13) C N ratio for Micro Giological decomposition of organic
matter (humus) is roughly……………..
10 1 1 10 I
30 10 10 30
14) The organic debris layer of soil is called………..
O horizon A horizon I
B horizon C horizon
PART II
Q2 Write an easy on Biofertilizers. 14
Q3 Describe in detail Carbon Cycle. 14
Q4 Describe in detail Biopesticides 14
Q5 Write any two of the following. 14
Plant tissue culture
ii) Nitrogen Cycle
iii) Phizosphere and phyioshere
Q6 Write any two of the following 14
Green Manure
ii) Physicochemical and biological properties of soil.
iii) Root nedulation