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Microbiology of Soils

Microbiology of Soils
Nitrogen fixation refers to the direct conversion of atmospheric nitrogen gas into

nitrate
glucose
ammonia
ATP

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

Anabaena
Nostoc
Both (a) and (b)
Clostridium

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Microbiology of Soils
In the process of nitrogen fixation, which of the following microorganism is involved?

Non symbiotic and symbiotic microorganisms only
Non symbiotic microorganisms only
Symbiotic microorganisms only
None of these

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Microbiology of Soils
The population of algae in soil is __________ that of either bacteria or fungi.

generally smaller than
none of these
equal to
generally greater than

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

denitrification
nitrification
ammonification
nitrogen fixation

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Microbiology of Soils
Which of the following microorganism use H2S as the electron donor to reduce carbon dioxide?

Chromaticum
Chlorobium
Rhodomicrobium
Both (a) and (b)

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