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Microbial Metabolism

Microbial Metabolism
The glyoxylate cycle is used by some microorganisms when___________ is the sole carbon source.

carbon dioxide
acetate
nitrate
all of these

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Microbial Metabolism
The relationship between an oxidation-reduction potential difference and the standard free energy change is (where n is the number of moles of electron transferred, F= Faraday's constant and E°= standard oxidation-reduction potential difference)

ΔG° = nFlnE°
ΔG° = -nFE°
ΔG° = -nFlnE°
ΔG° = nFE°

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

CO2
nitrate
oxygen
sulfate

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

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

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Microbial Metabolism
When acetate is the sole source of carbon for some microorganisms, the cycle which is used, is called

pentose phosphate pathway
glyoxylate pathway
glycolyic pathway
oxaloacetate pathway

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Microbial Metabolism
Phosphate deregulated mutants are

highly sensitive to phosphate regulation
less sensitive to phosphate regulation
none of these
moderately sensitive to phosphate regulation

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