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Microbiology of Soils

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

Nocardia
Streptomyces
all of these
Micromonospora

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Microbiology of Soils
Which of the following soil microorganism is involved in the reduction of sulfates to H2S?

Rhodospirillum
Desulfotomaculum
Rhodomicrobium
Thiobacillus thiooxidans

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Microbiology of Soils
Some microorganisms have the ability to increase the nitrogen content of soils, are called as

denitrification
all of these
nitrogen fixation
nitrification

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

Chromaticum
Rhodomicrobium
Both (a) and (b)
Chlorobium

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

De-nitrifying bacteria
Cyanobacteia
Nitrifying bacteria
Pectin decomposing bacteria

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Microbiology of Soils
Assimilative denitrification is done by

fungi
plants
all of these
prokaryotes

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MORE MCQ ON Microbiology of Soils

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