10. In the final stage of the oxidation of food molecules, a gradient of protons
ID: 216684 • Letter: 1
Question
10. In the final stage of the oxidation of food molecules, a gradient of protons is formed across the inner mitochondrial membrane, which is normally impermeable to protons. If cells were exposed to an uncoupling agent that causes the membrane to become freely permeable to protons, which of the following effects would you expect to observe? (circle one option; 2 points)
(a) The ratio of ATP to ADP in the cytoplasm would fall.
(b) NADH would build up.
(c) Carbon dioxide production would cease.
(d) The consumption of oxygen would fall.
Explanation / Answer
The following effect would be observed if cells were exposed to an uncoupling agent that causes the membrane to become freely permeable to protons:
(a) The ratio of ATP to ADP in the cytoplasm would fall
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