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Microbiology of Soils

Microbiology of Soils
Assimilative denitrification is done by

fungi
plants
all of these
prokaryotes

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Microbiology of Soils
For rapid decomposition by microbes, the substrate should have a C/N ratio of

30-40
20-30
10-20
60-80

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

sulfur oxidation
nitrogen fixation
all of these
nitrogen oxidation

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Microbiology of Soils
Denitrification may be distinguished as

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

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Microbiology of Soils
Nitrifying bacteria can not be isolated directly by the usual techniques employed to isolate hetrotrophic bacteria. The reasons may be due to

none of these
medium growth
slow growth
fast growth

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

Rhodomicrobium
Chlorobium
Both (a) and (b)
Chromaticum

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