Question

What substance do the carrier proteins transport across the inner mitochondrial membrane?

Answer 1

NADH and FADH2 molecules release hydrogenions that are transported across the inner mitochondrial membrane with the help of electrons. The result of these multiple processes is the production of large amounts of ATP.

The action of the sodium-potassium pump is an example of primary active transport. The two carrier proteins on the left are using ATPto move sodium out of the cell against the concentration gradient. The proteins on the right are using secondary active transport to move potassium into the cell.

Answer 2

Hydrogen ions are transported across the inner mitochondrial membrane with the help of electrons, which results production of large amount of ATP. Hydrogen ions transported above are released by the NADH and FADH2 molecules.