Q. Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on :
A) proton gradient
B) accumulation of K ions
C) accumulation of Na ions
D) membrane potential
Explanation
[Solution from source] Mitchell's chemiosmotic theory says that electron transport pumps protons across a membrane, and the protons flowing back through ATP synthase (CF₀-CF₁ or F₀-F₁) drive ATP formation. The driving force is the proton gradient, not K⁺ or Na⁺ build-up. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.