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 fatty acids
cellular bicarbonate
the cytoplasmic membrane
nucleic acids

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Microbial Metabolism
ATPase

is the enzyme that incorporates ATP into messenger RNA
carries out each of the reactions indicated in (a) and (b)
extrudes protons from the cell coupled to the hydrolysis of ATP to ADP
synthesizes ATP, coupled to transfer of extracellular protons into the cell

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