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Chemiosmosis

OCR A-level BiologyEnergy for Biological ProcessesLesson 7 of 8

There are 'stalked particles' or ATP synthase in the thylakoid membrane. ATP synthase is a proton channel and an enzyme. For every three protons that pass through the channel, one molecule of ATP is made from ADP and inorganic phosphate.

Diagram

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Key terms in this lesson

ATP
Adenosine triphosphate, the universal energy currency of cells, which releases energy for cellular reactions when hydrolysed to ADP and inorganic phosphate.
Thylakoid
A flattened, membrane-bound disc within a chloroplast, stacked into grana, where the light-dependent reactions of photosynthesis occur.

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