An alternative mode of entry into the electron transport chain is the oxidation of
A) malate to oxalosuccinate.
B) succinate to fumarate.
C) isocitrate to α -ketoglutarate.
D) α -ketoglutarate to succinyl-CoA.

Question

Quizplus · Accepted Answer

Succinate to fumarate is an oxidation step in the citric acid cycle that directly involves the electron transport chain via the enzyme succinate dehydrogenase, which is also part of complex II in the electron transport chain. This allows for the direct transfer of electrons from succinate oxidation to the electron transport chain.

An Alternative Mode of Entry into the Electron Transport Chain