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Microbial Metabolism

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

CO2
oxygen
nitrate
sulfate

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

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

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Microbial Metabolism
Nitrogen fixation is a process that requires

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

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Microbial Metabolism
Radioisotopes are frequently used in the study of cells. Assume a culture of E. coli is grown in a culture medium containing radioactive sulphur. At the end of 48 hours, it is expected to find the radioactive label located in

enzymes
all of these
DNA
RNA

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Microbial Metabolism
The reaction, where small precursor molecules are assembled into larger organic molecules is referred as

anabolism
metabolism
any of these
catabolism

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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

nucleic acids
cellular bicarbonate
the cytoplasmic membrane
the fatty acids

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