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Microbiology of Soils

Microbiology of Soils
Which of the following is not the biofertilisers producing bacteria?

Anabaena
Nostoc
Both (a) and (b)
Clostridium

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

All of these
Hydrolytic
Transitional
methanogenic

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Microbiology of Soils
The energy value of biogas is typically

1500 BTU/ft3
more than 5000 BTU/ft3
1,000 BTU/ft3
400-700 BTU/ft3

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Microbiology of Soils
Assimilative denitrification is done by

plants
prokaryotes
all of these
fungi

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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
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 also contains with traces of O2 and Cl2
It is composed almost exclusively of methane and carbon dioxide

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