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Microbiology of Soils

Microbiology of Soils
Denitrification may be distinguished as

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

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

Both (a) and (b)
Chromaticum
Chlorobium
Rhodomicrobium

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Microbiology of Soils
The energy value of biogas is typically

1500 BTU/ft3
1,000 BTU/ft3
more than 5000 BTU/ft3
400-700 BTU/ft3

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Microbiology of Soils
Nitrogen fixation refers to the direct conversion of atmospheric nitrogen gas into

ATP
glucose
nitrate
ammonia

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

De-nitrifying bacteria
Pectin decomposing bacteria
Cyanobacteia
Nitrifying bacteria

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