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Microbial Metabolism

Microbial Metabolism
Anoxygenic photosynthetic bacteria oxidize

ammonia
oxgyen
sulfide
water

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

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

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Microbial Metabolism
If ΔG of a chemical reaction is positive in value and keq is less than 1 then the chemical reaction will

proceeed in forward direction
proceed in reverse direction
none of these
not take place in any of the direction

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

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

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Microbial Metabolism
If radioactive bicarbonate was supplied to bacterial cells, which were actively synthesizing fatty acids, it is expected to find the bulk of the radioactivity in

the cytoplasmic membrane
cellular bicarbonate
the fatty acids
nucleic acids

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Microbial Metabolism
Phosphate deregulated mutants are

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

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