Answer:
All the above
Explanation:
If I understand the way the question is posed, the answer would be all of the above.
<span>The proteins of the electron transport chain are located in the inner membrane of the mitochondria.
Electrons are passed from one protein of the transport chain to another in a series of redox reactions, making the proton gradient which is then used to make ATP.</span>
The answer should be —10 — 5i