Cellular Respiration

AP Biology· difficulty 3/5

ATP synthase is best described as a

A
$Channel that lets protons move passively without performing chemical work$
B
$Pump that hydrolyzes ATP to actively transport protons across the membrane$
C
$Carrier that exchanges electrons for ATP across the inner mitochondrial membrane$
D
$Rotary motor that uses proton flow to mechanically drive ATP synthesis$
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Explanation

Proton flow rotates the c-ring; conformational changes in the F₁ subunit synthesize ATP from ADP + Pᵢ.

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