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Microbiology of Soils

Microbiology of Soils
The diagnostic enzyme for denitrification is

nitro oxidoreductase
nitrate oxidase
none of these
nitrate reductase

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Microbiology of Soils
The groups of bacteria which have the ability to fix nitrogen from air to soil are

symbiotic
none of these
both (a) and (b)
nonsymbiotic

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Microbiology of Soils
The phenomenon of commensalism refers to a relationship between organisms in which

both the species of a pair benefit
one species of a pair benefits
None of these
one species of a pair is more benefited

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Microbiology of Soils
The microbial ecosystem of soil includes

biotic components of soil
None of these
biotic and abiotic components of soil
abiotic components of soil

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

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

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Microbiology of Soils
The nitrogenase consists of

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

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