Question

question 10 (1 point)
what is true of oxidative phosphorylation?
it requires carbon dioxide.
it occurs in the outer membrane of the mitochondria.
it is the formation of atp by the flow of protons through atp synthase.
all of the above.

Explanation:

• Option 1: Oxidative phosphorylation does not require carbon dioxide (CO₂ is involved in processes like the Calvin cycle or Krebs cycle's input/output in different ways, not directly in oxidative phosphorylation).
• Option 2: Oxidative phosphorylation occurs in the inner mitochondrial membrane (and the intermembrane space for proton gradient), not the outer membrane.
• Option 3: Oxidative phosphorylation involves the electron transport chain creating a proton gradient, and then protons flow through ATP synthase to phosphorylate ADP to ATP, so this statement is correct.
• Option 4: Since the first two options are incorrect, "All of the above" is wrong.

Answer:

C. It is the formation of ATP by the flow of protons through ATP synthase.