(A) The incorrect statement is $A$. Complex $I$ ($NADH$ dehydrogenase) specifically accepts electrons and protons from $NADH$ only,not from $FADH_2$.

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Enzyme complex $I$ accepts electrons and $H^+$ from $NADH$ and $FADH_2$.

(A) The incorrect statement is $A$. Complex $I$ ($NADH$ dehydrogenase) specifically accepts electrons and protons from $NADH$ only,not from $FADH_2$. $FADH_2$ donates its electrons to Complex $II$ (Succinate dehydrogenase). Therefore,the statement that Complex $I$ accepts from both $NADH$ and $FADH_2$ is scientifically incorrect.

Class 11 Biology Respiration in Plants ETS

Medium

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

A
Enzyme complex $I$ accepts electrons and $H^+$ from $NADH$ and $FADH_2$.
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 the outer surface of the inner membrane.
D
$6 H^+$ passes through $F_0$ from the intermembrane space to the matrix down the electrochemical proton gradient to produce $3 ATP$.