AP Biologymediummcq1 pt
The energy to pump H⁺ across the inner mitochondrial membrane comes from
A.electrons falling through the transport chain
B.ATP hydrolysis
C.sunlight
D.glucose splitting
Explanation
Core Concept
As NADH's electrons drop in energy through the complexes, the released energy pumps protons out — converting redox energy into a gradient.
Correct Answer
Aelectrons falling through the transport chain
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