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Microbial Metabolism

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
Phosphate is considered to restrict the induction of

secondary metabolites
both (a) and (b)
none of these
primary metabolites

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

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

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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° = nFlnE°
ΔG° = nFE°
ΔG° = -nFE°

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Microbial Metabolism
Which of the following does not produce oxygen as a product of photosynthesis?

Cyanobacteria
Phytoplankton
Purple sulfur bacteria
Oak trees

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Microbial Metabolism
During the carboxylation phase of the Calvin cycle, CO2 combines with

ribulose 1,5 - bisphosphate
oxaloacetic acid
phosphoglyceraldehyde
pyruvic acid

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