Question

Chemiosmotic theory of ATP synthesis in the chloroplasts is based on:

• A. Membrane potential
• B. Accumulation of K ions
• C. Proton gradient
• D. Accumulation of Na ions

Answer 1

The correct option is C Proton gradient

According to the chemiosmosis theory of ATP generation. The ATP is generated utilizing the electrochemical gradient generated due to the accumulation of protons in the thylakoid lumen of chloroplast. The accumulation of protons gives rise to an electric gradient, due to the accumulation of positive charge and a chemical gradient due to the accumulation of hydrogen atom. When protons move along this electrochemical gradient through F0F0-F1F1 ATP synthase enzyme complex, ATP generation occurs.