What would happen if the concentration of H+ ions were the same on both
sides of the membrane when the channel opened?

A. H+ ions would not flow.

B. More H+ ions would be created.

C. H+ ions would flow into the mitochondrion.

D. H+ ions would flow out of the mitochondrion.

A. H+ ions would not flow.

Explanation:

Usually, particles move from areas of high concentration to low concentration (from places where there are a lot of particles to places where there are few particles).

However, here we see that there are equal amounts of H+ ions on both sides of the membrane, which means that there would not be any net flow of ions to either side.

Thus, the answer is A (the H+ ions will not flow).

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.