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Microbial Metabolism

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

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

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Microbial Metabolism
Standard free energy change (ΔG) can be expressed as

ΔG° = R/Tlnkeq
ΔG° = -RT/lnkeq
ΔG° = RTlnkeq
ΔG° = -RTlnkeq

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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
all of these
oxidation of pyruvate
atmospheric nitrogen fixation

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Microbial Metabolism
In aerobic respiration, the terminal electron acceptor is

nitrogen
nitrate
oxygen
hydrogen

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Microbial Metabolism
The acquisition energy by glucose fermentation requires

electron transport of electrons from NADH
substrate-level phosphorylation
the enzyme formic-hydrogen lyase
long-chain fatty acid oxidation

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Microbial Metabolism
Nitrogen fixation is a process that requires

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

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