Multiple choice

Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on

  1. membrane potential.

  2. accumulation of K ions.

  3. proton gradient.

  4. accumulation of Na ions.
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C Correct answer
Explanation

 Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on proton gradient.Chemiosmosis is the movement of ions across a selectively permeable membrane, down their electrochemical gradient. More specifically, it relates to the generation of ATP by the movement of hydrogen ions across a membrane during cellular respiration or photosynthesis.

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