What Is Unusual About the Way That H⁺ Ions Are

Multiple Choice

What is unusual about the way that H⁺ ions are transported across the inner mitochondrial membrane as compared to the movement of other ions like Na⁺ and Cl^- ions?

A) Na⁺ and Cl^- ions must traverse the full distance, but H⁺ ions materialize on the other side of the membrane.
B) Na⁺ and Cl^- ions must traverse the full distance, but H⁺ ions can hop through a channel by exchanging themselves with other protons found along the pathway.
C) Na⁺ and Cl^- ions can hop through a channel by exchanging themselves with other similar ions found along the pathway, but H⁺ ions must traverse the full distance.
D) Na⁺ and Cl^- ions must traverse the full distance, but H⁺ ions must only go halfway.
E) Na⁺ and Cl^- ions must traverse the full distance, but H⁺ ions must change into neutrons first.