Which of the following outcomes would you expect if the pH of the thylakoid lumen increases from 4 to 6? A)More NADP⁺ will be reduced to NADPH. B)The rate of ATP synthesis by ATP synthase will decrease. C)Less oxygen will be produced. D)Proton transport through ATP synthase from the thylakoid lumen to the stroma will increase. E)The change in pH will not have a significant effect on the rate of photosynthesis.

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The decrease in proton concentration in the thylakoid lumen will lead to a decrease in the proton motive force, which is the force that drives ATP synthesis by ATP synthase. Therefore, the rate of ATP synthesis by ATP synthase will decrease. The other options are not affected by a change in thylakoid lumen pH.

Which of the Following Outcomes Would You Expect If the PH