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Microbiology of Soils

Microbiology of Soils
Denitrification may be distinguished as

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

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

nitrate
glucose
ammonia
ATP

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Microbiology of Soils
An example of a symbiotic nitrogen fixer is

Azotobacter
Rhizobium
Clostridium
Beijerinckia

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Microbiology of Soils
The population of algae in soil is __________ that of either bacteria or fungi.

none of these
equal to
generally greater than
generally smaller than

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Microbiology of Soils
__________ play a key role in the transformation of rock to soil.

De-nitrifying bacteria
Cyanobacteia
Pectin decomposing bacteria
Nitrifying bacteria

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

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

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