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Microbiology of Soils

Microbiology of Soils
Assimilative denitrification is done by

fungi
plants
prokaryotes
all of these

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

equal to
none of these
generally greater than
generally smaller than

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Microbiology of Soils
Which of the following microorganism use H2S as the electron donor to reduce carbon dioxide?

Chromaticum
Chlorobium
Rhodomicrobium
Both (a) and (b)

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Microbiology of Soils
The conversion of molecular nitrogen into ammonia is known as

denitrification
nitrogen fixation
nitrification
ammonification

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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?

Agrobacterium
Alcaligenes
None of these
Achromobacter

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Microbiology of Soils
Denitrification is carried out

usually by facultative anaerobes
predominantly by Bacillus spp
predominantly by Pseudomonas spp
All of these

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