16. During electron transport reactions a. OH- accumulates on the outside of the membrane while H accumulates on the inside. b. OH- accumulates on the inside of the membrane while H accumulates on the outside. c. both OH- and H accumulate on the inside of the membrane. d. both OH- and H accumulate on the outside of the membrane

Option B, OH- accumulates on the inside of the membrane while H+ accumulates on the outside.

Explanation:

In electron chain reaction, the electrons move through a series of electron transporters thereby undergoing redox reactions. This leads to accumulation of hydrogen ion (H+) with in the matrix and hence development of concentration gradient that leads to diffusion of hydrogen ion out of the matrix and accumulation of OH- ion on the inner side of the matrix while passing through ATP synthase

Hence, option B is correct

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