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Photosynthesis in Higher Plants question

2022 · Q10
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Photosynthesis in Higher Plants question

2022 · Q10

NEETBiologyPhotosynthesis in Higher PlantsMCQ+4 / −1

Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis? It involves:

  1. A
    Breakdown of proton gradient
  2. B
    Breakdown of electron gradient
  3. C
    Movement of protons across the membrane to the stroma
  4. D
    Reduction of NADP to NADPH2 on the stroma side of the membrane
View written solutionFree

Correct answer: B

Chemiosmosis requires a membrane, a proton pump, a proton gradient and ATP synthase. Energy is used to pump protons across a membrane to create a gradient or a high concentration of protons within the thylakoid lumen.

The NADP reductase enzyme is located on the stroma side of the membrane. Along with the electrons that come from the acceptor of electrons of PS I, protons are necessary for reduction of NADP+ to NADPH + H+.

The process does not involve breaking of electron gradient.

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