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
The mechanism of passive or facilitated diffusion require

metabolic energy
concentration of solute against an electrochemical gradient
accumulation or concentration of solute against an electrochemical gradient
accumulation of solute against an electrochemical gradient

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Microbial Metabolism
ATPase

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

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