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Microbial Metabolism

Microbial Metabolism
Which of the following(s) is/are the products of the light reactions of photosynthesis?

ATP only
ATP, NADPH, and O2
NADPH only
ATP and O2 only

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

H2
H2S
S (elemental sulphur)
H2O

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Microbial Metabolism
Phosphate regulation has been observed in the production of

all of these
gibberelins
alkaloids
antibiotics

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

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

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

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