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Microbiology of Soils

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
Which of the following is not the biofertilisers producing bacteria?

Clostridium
Nostoc
Anabaena
Both (a) and (b)

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

all of these
nitrogen fixation
sulfur oxidation
nitrogen oxidation

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Microbiology of Soils
Assimilative denitrification is done by

fungi
prokaryotes
all of these
plants

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Microbiology of Soils
The organisms responsible for the characteristic musty or earth odor of a freshly plowed field is/are

all of these
Streptomyces
Micromonospora
Nocardia

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Microbiology of Soils
The nitrogenase consists of

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

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