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Microbial Metabolism

Microbial Metabolism
In establishing proton gradient for chemiosmotic ATP generation by aerobic respiration the terminal electron acceptor is

sulfate
oxygen
CO2
nitrate

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Microbial Metabolism
High energy transfer compounds are capable of

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

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Microbial Metabolism
During the reduction phase of the Calvin cycle, phosphoglyceric acid is reduced to______utilizing________as the reduction source.

pyruvic acid; NADPH+H+
ribulose 1,5 - bisphosphate; NADH+H+
phosphoglyceraldehyde; NADPH+H+
phosphoglyceraldehyde; NADH+H+

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Microbial Metabolism
Anoxygenic photosynthetic bacteria oxidize

sulfide
water
ammonia
oxgyen

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Microbial Metabolism
If ΔG of a chemical reaction has a negative value, the reaction

both (a) and (b)
requires energy
releases energy
none of these

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

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

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