Question

the inner membrane of a mitochondrion contains the protein __________, which harnesses the energy created by $h^{+}$ flow to produce atp by a process called __________.

multiple choice

cytochrome c, reduction

atp synthase; oxidation

enzyme complex; reduction

enzyme complex; proton pumping

atp synthase; the chemiosmotic mechanism

Explanation:

ATP synthase is an enzyme located in the inner mitochondrial membrane. It uses the energy from the flow of hydrogen ions (\(H^+\)) down their concentration gradient (chemiosmosis) to synthesize ATP from ADP and inorganic phosphate. The chemiosmotic mechanism describes this process of ATP production using the energy of a proton gradient. Cytochrome c is involved in the electron - transport chain (ETC) but not directly in harnessing \(H^+\) flow for ATP synthesis. Oxidation is a general chemical process (loss of electrons), and while parts of cellular respiration involve oxidation, it is not the specific process related to \(H^+\) flow for ATP synthesis here. Enzyme complex is too vague, and reduction (gain of electrons) is also not the relevant process. Proton pumping is part of establishing the \(H^+\) gradient, not the process of using it to make ATP.

Answer:

ATP synthase; the chemiosmotic mechanism