Protons accumulate in the thylakoid lumen during light-dependent reactions. Which process, besides photolysis, is directly responsible for building this electrochemical gradient?
Q1. Protons accumulate in the thylakoid lumen during light-dependent reactions. Which process, besides photolysis, is directly responsible for building this electrochemical gradient?
Answer: Cytochrome b6f complex pumping
Explanation: The cytochrome b6f complex pumps protons into the lumen. ATP synthase is wrong because it facilitates proton flow back into the stroma.