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Microbiology of Soils

Microbiology of Soils
The nitrogenase consists of

dinitrogenase
both (a) and (b)
dinitrogenase reductase
none of these

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Microbiology of Soils
Which of the following is capable of oxidizing sulfur to sulfates?

Rhodomicrobium
Desulfotomaculum
Thiobacillus thiooxidans
Rhodospirillum

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Microbiology of Soils
The conversion of molecular nitrogen into ammonia is known as

nitrification
nitrogen fixation
denitrification
ammonification

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

ingestion of bacteria
all of these
ingestion of fungi
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
all of these
denitrification
nitrification

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Microbiology of Soils
Which are the main source of biofertilisers?

Cyanobacteria
Bacillus
Streptococcus
None of these

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