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Microbiology of Soils

Microbiology of Soils
The nitrogenase consists of

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

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

glucose
ammonia
nitrate
ATP

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

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

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

ingestion of mold
ingestion of bacteria
ingestion of fungi
all of these

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

none of these
generally greater than
equal to
generally smaller than

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Microbiology of Soils
Assimilative denitrification is done by

fungi
all of these
prokaryotes
plants

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