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Microbiology of Soils

Microbiology of Soils
The nitrogenase consists of

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

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

ammonia
glucose
nitrate
ATP

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Microbiology of Soils
Which of the following statement is not true about composition of biogas?

Both (a) and (b)
It also contains with traces of H2S, N2, H2and CO
It is composed almost exclusively of methane and carbon dioxide
It also contains with traces of O2 and Cl2

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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
Which of the following is not the biofertilisers producing bacteria?

Clostridium
Anabaena
Nostoc
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?

None of these
Alcaligenes
Achromobacter
Agrobacterium

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