15. How do uncoupling agents affect the electron transport chain and oxidative phosphorylation?
(A)They block the flow of electrons, so protons aren't pumped, and ATP synthesis ceases.
(B)They remove electrons from the chain, so less protons are pumped, and ATP synthesis decreases.
(C)They block the flow of protons through the ATP synthase, so ATP synthesis ceases. Electron flow and proton pumping are
also halted as a result.
(D)They provide an alternative path for protons to re-enter the mitochondrial matrix, so ATP synthesis decreases. Electron flow
and proton pumping are not affected.