Question

Diagram the process of electron transport (from NADH to O2 ) and oxidative phosphorylation in a suspension of these vesicles.

Answer 1

Stepwise flow of electrons through the electron transport chain from NADH, succinate, and FADH2 to O2 (blue arrows)(given below)>>>>

Each of the four large multiprotein complexes in the chain is located in the inner mitochondrial membrane and contains several specific electron carriers. Coenzyme Q (CoQ) and cytochrome c transport electrons between the complexes. As shown by the redox scale, electrons pass in sequence from carriers with a lower reduction potential to those with a higher (more positive) potential. The free-energy scale shows the corresponding reduction in free energy as a pair of electrons moves through the chain. The energy released as electrons flow through three of the complexes is sufficient to power the pumping of H+ ions across the membrane, establishing a proton-motive force.