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Microbiology of Soils

Microbiology of Soils
Which are the main source of biofertilisers?

Bacillus
None of these
Cyanobacteria
Streptococcus

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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
Streptomyces
Micromonospora

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

nitrogen fixation
nitrification
denitrification
ammonification

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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
None of these
one species of a pair is more benefited
one species of a pair benefits

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Microbiology of Soils
The nitrogenase consists of

none of these
dinitrogenase reductase
dinitrogenase
both (a) and (b)

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Microbiology of Soils
The diagnostic enzyme for nitrogen-fixing organisms is

nitrogenase
nitrate reductase
nitrate oxidase
none of these

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