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Microbiology of Soils

Microbiology of Soils
Assimilative denitrification is done by

all of these
prokaryotes
plants
fungi

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

nitrogenase
nitrate oxidase
nitrate reductase
none of these

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Microbiology of Soils
Denitrification may be distinguished as

blue baby syndrome
assimilative
dissimilative
both (a) and (b)

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

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

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Microbiology of Soils
The nitrogenase consists of

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

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Microbiology of Soils
Which of the following species of different genera of bacteria are not capable of transforming nitrate to nitrogen?

Achromobacter
None of these
Alcaligenes
Agrobacterium

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