Home / Question Bank / Biology / Photosynthesis in Higher Plants / Question 9 NEET Biology Class 11 ATP synthesis — chemiosmotic hypothesis Medium Single correct
According to the chemiosmotic hypothesis of ATP synthesis in chloroplasts, protons (H⁺) accumulate in a particular compartment during the light reaction, creating a gradient that drives ATP synthase. In which compartment do these protons accumulate, and in which direction do they move to synthesise ATP? (A) Protons accumulate in the stroma and move into the thylakoid lumen through ATP synthase to synthesise ATP (B) Protons accumulate inside the thylakoid lumen and move from the lumen, through ATP synthase, into the stroma to synthesise ATP (C) Protons accumulate in the mitochondrial matrix and diffuse into the chloroplast stroma through ATP synthase (D) Protons accumulate equally in the stroma and the lumen, so no net gradient or directional flow is needed for ATP synthesis Show answer and explanation ← Question 8 All Photosynthesis in Higher Plants questions Question 10 → More NEET Biology chapters © 2026 Lumi (Aikolumi Software Pvt Ltd). Original questions written by Lumi. Free to view and practise on this site. Copying, republishing or reproducing these questions, options or solutions, in print or online, is not permitted.
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