As electrons fall from photosystem ii to photosystem i, the cytochrome complex uses the energy to pump ions. this builds a proton gradient that is used in chemiosmosis to produce what molecule?

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03-08-2022
Biology

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As electrons fall from photosystem ii to photosystem i, the cytochrome complex uses the energy to pump ions. this builds a proton gradient that is used in chemiosmosis to produce what molecule?

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Vickynehra Vickynehra · Answer 1 · 2022-08-09T20:25:31+02:00

As electrons fall from photosystem ii to photosystem i, the cytochrome complex uses the energy to pump ions. this builds a proton gradient that is used in chemiosmosis to produce ATP.

In plants and cyanobacteria, a two-step mechanism known as noncyclic photophosphorylation results in the direct production of ATP and NADPH during photosynthesis. High-energy electrons exiting photosystem II are used in the noncyclic photophosphorylation process just outlined to produce ATP, which is then transferred to photosystem I to promote the creation of NADPH.

For every pair of electrons that move from H2O to NADP+ to create a molecule of NADPH, this results in the production of slightly more than one molecule of ATP.

To learn more about photophosphorylation click here

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