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Microbiology of Soils

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

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

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

none of these
nitrogenase
nitrate reductase
nitrate oxidase

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Microbiology of Soils
The diagnostic enzyme for denitrification is

none of these
nitrate oxidase
nitro oxidoreductase
nitrate reductase

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Microbiology of Soils
Denitrification may be distinguished as

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

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Microbiology of Soils
An example of a symbiotic nitrogen fixer is

Clostridium
Rhizobium
Azotobacter
Beijerinckia

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Microbiology of Soils
The nitrogenase consists of

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

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