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Microbiology of Soils

Microbiology of Soils
The breakdown of cattle manure in biogas is accomplished by which of the following type of bacteria?

All of these
methanogenic
Transitional
Hydrolytic

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Microbiology of Soils
An example of a symbiotic nitrogen fixer is

Clostridium
Beijerinckia
Rhizobium
Azotobacter

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

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

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Microbiology of Soils
Assimilative denitrification is done by

all of these
prokaryotes
fungi
plants

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

nitrate oxidase
nitrate reductase
none of these
nitrogenase

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Microbiology of Soils
The diagnostic enzyme for denitrification is

none of these
nitro oxidoreductase
nitrate reductase
nitrate oxidase

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