Which of the Following Statements Is Correct with Respect to the Flow

Multiple Choice

Which of the following statements is correct with respect to the flow of protons between the intermembrane space and the matrix?

A) Protons flow spontaneously directly through the lipid bilayer from the intermembrane space to the matrix.
B) Protons flow spontaneously directly through the lipid bilayer from the matrix to the intermembrane space.
C) Protons flow spontaneously through a channel in the lipid bilayer from the intermembrane space to the matrix.
D) Protons flow spontaneously through a channel in the lipid bilayer from the matrix to the intermembrane space.