Energy for Biological Processes

OCR A-level BiologyTopic 6 of 98 lessons

Revision notes for Energy for Biological Processes in OCR Biology A (H420). Read the start of any lesson here, then sign in free for the whole lesson, the R.E.C.I.P.E. recall steps and the quiz.

1. ATPATP is the universal energy currency in cells.
2. ChloroplastsChloroplasts are the site of photosynthesis.
3. Photosynthetic pigmentsThe main photosynthetic pigment in chloroplasts is the blue-green chlorophyll a.
4. PhotosystemsPhotosynthetic pigments are arranged in light-harvesting clusters or photosystems in the thylakoid membrane.
5. Cyclic PhotophosphorylationCyclic photophosphorylation is one of two light-dependent reactions and involves photosystem I only.
6. Non-cyclic PhotophosphorylationNon-cyclic photophosphorylation involves both PSI and PSII.
7. ChemiosmosisThere are 'stalked particles' or ATP synthase in the thylakoid membrane.
8. Calvin CycleATP and reduced NADP from the light-dependent reactions are used in the Calvin cycle which is a light-independent process.

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