Question

Which one of the following is 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 coupled to the catalytic site of the $F_1$ for ATP production
• C. Cytochrome-c is a mobile protein attached to the outer surface of inner 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 $FAD{H}_2$

There are four protein complexes (labelled complex l-IV) in the electron transport chain, which are involved in moving electrons from $NADH$ and $FAD{H}_2$ to molecular oxygen. Complex I accepts electrons and $H^{+}$ from $NADH$ while complex II accepts from $FAD{H}_2$.