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Microbial Metabolism

Microbial Metabolism
Nitrogen fixation is a process that requires

energy
both (a) and (b)
an anaerobic environment
an aerobic environment

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Microbial Metabolism
Free energy change (ΔG) of a reaction is referred as the amount of energy

none of these
taken up during reaction
liberated or taken up during reaction
liberated during reaction

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Microbial Metabolism
Entner - Doudoroff pathway is not found in

Both (a) and (b)
aerobic prokaryotes
anaerobic prokaryotes
eukaryotes

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Microbial Metabolism
The major route for incorporation of ammonia (NH4+) into organic compounds is via

reduction of pyruvate or alpha-ketoglutarate by enzymes
oxidation of pyruvate
atmospheric nitrogen fixation
all of these

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Microbial Metabolism
In an oxygenic photosynthesis, the green and the purple bacteria do not use which of the following one as an electron source?

H2S
H2
S (elemental sulphur)
H2O

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Microbial Metabolism
TCA cycle functions in

catabolic reactions
anabolic reactions
none of these
amphibolic reactions

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