Uploaded October 2023 | Updated September 2026, 6 hours ago

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You can find all my A Level Biology videos fully indexed at freesciencelessons.co.uk/a-level-revision-videos/a-level-biology

In this video, we look at the light-dependent reactions. First we look at non-cyclic photophosphorylation and cyclic photophosphorylation and how these use the energy of excited electrons via electron transport chains. We then look at how ATP is generated by chemiosmosis.