What would be the outcome if the pump protein shown in Fig. 5.13a instead acted as a carrier that allowed protons to move from the extracellular fluid into the cytoplasm?
A. The proton electrochemical gradient would
be reversed.
B. ATP could be synthesized from ADP + Pi.
C. The number of protons on either side of
the membrane would equalize.
D. Two answer options are true: ATP could
be synthesized from ADP + Pi AND the
number of protons on either side of the
membrane would equalize.
Answer Key: D
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