Answer:
D
Explanation:
I had this question before and this is the guaranteed answer
Answer:
Electrophoresis is a laboratory technique used to separate DNA, RNA, or protein molecules based on their size and electrical charge. An electric current is used to move molecules to be separated through a gel. ... The conditions used during electrophoresis can be adjusted to separate molecules in a desired size range.
i think the correct answer is B considering that the channels are not always open for the protons to freely diffuse through the inner membrane.