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Microbiology of Soils

Microbiology of Soils
Assimilative denitrification is done by

all of these
plants
fungi
prokaryotes

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

nitrification
denitrification
ammonification
nitrogen fixation

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

denitrification
nitrification
nitrogen fixation
all of these

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

Chlorobium
Rhodomicrobium
Both (a) and (b)
Chromaticum

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Microbiology of Soils
The diagnostic enzyme for nitrogen-fixing organisms is

nitrate reductase
none of these
nitrate oxidase
nitrogenase

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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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