A researcher adds a chemical agent to an isolated chloroplast suspension that makes the thylakoid membrane highly permeable to protons. If this suspension is exposed to light, which of the following processes will be immediately inhibited?

Step-by-step solution

According to the chemiosmotic hypothesis, the synthesis of ATP is strictly dependent on the creation and maintenance of a proton gradient across the thylakoid membrane. If a chemical agent makes the membrane highly permeable to protons, the protons will simply diffuse back into the stroma without passing through the ATP synthase enzyme ( CF₀ - CF₁ complex). Consequently, no proton gradient can be established, and ATP synthesis will be immediately inhibited. The absorption of light, splitting of water, and electron