M.Sc. (Semester IV) (CBCS) Examination Nov/Dec-2018
Microbiology
AGRICULTURAL MICROBIOLOGY
Time: 2½ Hours Max. Marks: 70
Instructions: Part Q.1 is compulsory.
Attempt any four questions from part-II.
Figures to the right indicate full marks.
Answer to the Part I and Part II are to be written in same answer booklet
only.
PART I
Q.1 Rewrite the sentences by choosing correct answer from given alternatives: 14
is smallest particle of soil.
Silt Clay
Sand Gravel
is non symbiotic nitrogen fixer.
Azotobacter Rhizobium
Frankia Bacillus
The conversion of nitrate to nitrous oxide and nitrogen gas by soil organisms
is called
Nitrification Ammonification
Methylation Denitrification
Organic matter decomposition is measured by evolution.
O2 H2S
NH3 CO2
Living plants can utilize only soluble phosphorus.
Inorganic Organic
Bounde Degraded
is common nitrogen fixer is paddy fields.
Rhizobium Azotobacter
Azospirillum Frankia
medium is used for isolation of cyanobacteria.
Fogg's Jenson's
CRYEMA MRS
In vermicomposting earthworms are sensitive to
Water Light
Carbon Oxygen
Musty or earthy odor of a freshly plowed field is due to
Nocardia Azotobacter
Streptomyces Rhizobium
10) should be added to increase the efficiency of biofertilizers.
Phosphorus Calcium
Carbon Nitrogen
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SLR-VP-447
11) The mutualistic relationship between fungi and plant roots is called
Horizon Rhizospher
Microfilm Mycorrhiza
12) protein is activated by enzyme in the midget of
susceptible larrae.
Lipase Protease
Amylase Phosphatase
13) Bacillus thuringiensis is used to control
Insect pests Bacterial pathogens
Nematods Protozoas.
14) Air and water together accounts for approximately of the soil
volume.
10 20
80 50
PART II
Q.2 Describe in detail Nitrogen Cycle. 14
Q.3 Write an essay on composting. 14
Q.4 Describe in detail production and applications of Biofertilizers. 14
Q.5 Write any two of the following:- 14
Plant tissue culture.
Bio Pesticide Production
Green manure
Q.6 Write any two of the following:- 14
Carbon Cycle
Soil Micro Organisms
Economic and Future prospects of biopesticides.