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Microbiology of Soils

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

Clostridium
Anabaena
Nostoc
Both (a) and (b)

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Microbiology of Soils
The diagnostic enzyme for denitrification is

nitrate oxidase
nitrate reductase
nitro oxidoreductase
none of these

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Microbiology of Soils
Bacteria, as a group, are responsible for

nitrogen oxidation
nitrogen fixation
all of these
sulfur oxidation

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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
The nonsymbiotic bacteria which fix nitrogen live in the soil independently are

All of these
considerably less important in comparison to the symbiotic bacteria
Clostridium
Azotobacter

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Microbiology of Soils
The microbial ecosystem of soil includes

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

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