Question

Select all true statements regarding ETC: High-transfer-potential electrons from NAD+ and FAD+ are responsible for the oxidation of oxygen to synthesize ATP ETC components are arranged so that electrons always flow to the component with increasing reduction potential FADH2-derived electrons yield more ATP than the amount of ATP produced from NADH-derived electrons None of these statements are true. Electron flow from ETC generates proton gradient

Answer 1

Ans.) The true statement among the given options is “Electron flow from ETC generates proton gradient.”
(As indicated to its name, electron transport chain is responsible for the transfer of electrons and eventually it triggers the protons transfer transverse the membrane. This transfer of electron creates an electrochemical proton gradient that triggers the synthesis of ATP. Hence, at certain point electron flow from ETC is responsible for generation of proton gradient.)