Question

18. Electron flow down the electron-transport chain leads to the

transport of protons across the inner mitochondrial membrane from inside the matrix to the intermembrane space.

transport of protons across the inner mitochondrial membrane from the intermembrane space into the matrix.

coupled synthesis of GTP.

dangerous imbalance of K⁺ ions across the mitochondrial membrane.

19. Which electron carrier has an isoprenoid tail?

NADH

cytochrome c

coenzyme Q

FADH^­₂

20. Which of the following does not pump protons?

Complex I

Complex II

Complex III

Complex IV