Question

About electron transport in the mitochondria, which statement is WRONG?

A. NADH oxidation requires electron transport through four complexes
B. FADH2 oxidation requires electron transport through three complexes.
C. Electrons transport to carriers showing more positive reduction potential
D. electron transport is coupled with H+ translocation

Answer 1

The incorrect statement about electron transport in the mitochondria is that electrons move to carriers with more positive reduction potential; instead, they move from higher to lower reduction potential carriers.

Step-by-step explanation:

Electron Transport Chain Misconception

The statement that is WRONG about electron transport in the mitochondria is: C. Electrons transport to carriers showing more positive reduction potential. In the electron transport chain (ETC), electrons move from carriers with a higher reduction potential to those with a lower one, rather than the other way around.

The oxidation of NADH does indeed require electron transport through four complexes.

For FADH2, electrons enter the ETC at Complex II, skipping Complex I, and hence it involves only three complexes for its oxidation.

This electron transport is indeed coupled with H+ translocation, which generates the proton gradient used to produce ATP.