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Microbial Metabolism

Microbial Metabolism
Nitrogen fixation is a process that requires

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

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

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

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Microbial Metabolism
Assimilatory sulfate reduction involves the nucleotide __________ during the incorporation of H2S in the production of __________ .

GTP; cytosine
ATP; methionine
UTP; cytosine
ATP; cytosine

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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?

H2
H2O
H2S
S (elemental sulphur)

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Microbial Metabolism
High energy transfer compounds are capable of

transferring large amounts of free energy
accepting large amounts of free energy
measuring free energy
None of these

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Microbial Metabolism
Which of the following(s) is/are the products of the light reactions of photosynthesis?

ATP only
ATP and O2 only
NADPH only
ATP, NADPH, and O2

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