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Microbiology of Soils

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

Rhodomicrobium
Chromaticum
Both (a) and (b)
Chlorobium

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Microbiology of Soils
The phenomenon of commensalism refers to a relationship between organisms in which

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

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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 fungi on infecting crop roots can improve their uptake of phosphorus and other nutrients?

Aspergillus niger
Candida torulopsis
Saccharomyces cerevisiae
VA Mycorrhiza

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Microbiology of Soils
Denitrification may be distinguished as

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

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Microbiology of Soils
The nitrogenase consists of

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

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