Photosynthesis in Higher Plants · NEET Preparation Botany
Chemiosmotic hypothesis explains ATP synthesis in chloroplasts. Which of the following conditions is necessary for ATP formation across the thylakoid…
Practice question from Photosynthesis in Higher Plants (NEET Preparation Botany), with the correct answer and a step-by-step solution.
hard · MCQ · Q-307D66
Chemiosmotic hypothesis explains ATP synthesis in chloroplasts. Which of the following conditions is necessary for ATP formation across the thylakoid membrane?
- A.Higher proton concentration in the stroma compared to the lumen
- B.A proton gradient with high concentration in the thylakoid lumenCorrect answer
- C.Equal concentration of protons in stroma and lumen
- D.Breakdown of the thylakoid membrane to allow free diffusion
Solution
According to the chemiosmotic hypothesis, an electrochemical proton gradient is established with a high concentration of protons (low pH) inside the thylakoid lumen, driving ATP synthesis as protons flow back into the stroma through ATP synthase.
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