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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 phenomenon of commensalism refers to a relationship between organisms in which

both the species of a pair benefit
one species of a pair benefits
None of these
one species of a pair is more benefited

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

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

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Microbiology of Soils
The diagnostic enzyme for denitrification is

nitrate oxidase
nitro oxidoreductase
nitrate reductase
none of these

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Microbiology of Soils
The organisms responsible for the characteristic musty or earth odor of a freshly plowed field is/are

all of these
Nocardia
Micromonospora
Streptomyces

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Microbiology of Soils
The transformation of nitrates to gaseous nitrogen is accomplished by microorganisms in a series of biochemical reactions. The process is known as

denitrification
ammonification
nitrification
nitrogen fixation

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