Predict which of the following would happen if a plant was exposed to a toxin that made the thylakoid membranes permeable to protons. A)The proton gradient across the thylakoid membrane would be eliminated. B)The protons necessary to generate NADPH from NADP⁺ would no longer be present. C)The oxidation and reduction of the protein complexes in the electron transport would be prevented. D)A reversal of the proton gradient across the thylakoid membrane would result in a higher pH in the thylakoid lumen than in the surrounding stoma.

Question

Quizplus · Accepted Answer

The thylakoid membrane's impermeability to protons is crucial for establishing a proton gradient during photosynthesis. If the membrane becomes permeable to protons, the gradient, which drives ATP synthesis, would dissipate.

Predict Which of the Following Would Happen If a Plant