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Microbial Metabolism

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

S (elemental sulphur)
H2
H2O
H2S

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

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

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Microbial Metabolism
Entner-Doudoroff pathway is found in

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

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Microbial Metabolism
Incorporation of atmospheric N2to NH4+ occurs via the process of

nitrogen fixation
transamination
assimilatory nitrate reduction
deamination

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Microbial Metabolism
Which of the following catalyze liberation of orthophosphate from organic P compounds and inorganic pyrophosphate ?

Protease
Oxidoreductase
Hydrogenase
Alkaline phosphates

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

nitrate
oxygen
sulfate
CO2

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