Question

Which one of the following is an incorrect statement for mitochondrial ETC and oxidative phosphorylation?

• A. Enzyme complex I accepts electrons and $H^{+}$ from $NADH$ and $FAD{H}_2$
• B. Passage of protons through the channel is coupled to the catalytic site of the $F_1$ for $ATP$ production
• C. Cytochrome-c is a mobile protein attached to outer surface of inner mitochondrial membrane
• D. $6H+$ passes through $F_0$ from intermembrane space to the matrix down the electrochemical proton gradient to produce $3ATP$

Answer 1

The correct option is A Enzyme complex I accepts electrons and $H^{+}$ from $NADH$ and $FAD{H}_2$

Electrons from $NADH$ produced in the mitochondrial matrix during citric acid cycle are oxidised by an $NADH$ dehydrogenase (complex I).

Electrons from $FAD{H}_2$ produced are oxidised by complex II.