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Microbiology of Soils

Microbiology of Soils
Which of the following is not the biofertilisers producing bacteria?

Both (a) and (b)
Clostridium
Nostoc
Anabaena

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Microbiology of Soils
Most soil protozoa are flagellates or amoebas, having their dominant mode of nitrogen as

all of these
ingestion of fungi
ingestion of bacteria
ingestion of mold

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Microbiology of Soils
Some microorganisms have the ability to increase the nitrogen content of soils, are called as

nitrogen fixation
denitrification
nitrification
all of these

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Microbiology of Soils
Which of the following soil microorganism is involved in the reduction of sulfates to H2S?

Thiobacillus thiooxidans
Rhodospirillum
Desulfotomaculum
Rhodomicrobium

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Microbiology of Soils
The diagnostic enzyme for denitrification is

nitrate oxidase
nitro oxidoreductase
nitrate reductase
none of these

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Microbiology of Soils
Assimilative denitrification is done by

plants
fungi
prokaryotes
all of these

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