BRAINCAKEPhotosystems
Photosynthetic pigments are arranged in light-harvesting clusters or photosystems in the thylakoid membrane. Several hundred accessory pigments capture light energy and channel the energy to a chlorophyll a molecule at the reaction centre of the photosystem.
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Key terms in this lesson
- Thylakoid
- A flattened, membrane-bound disc within a chloroplast, stacked into grana, where the light-dependent reactions of photosynthesis occur.
- Chlorophyll
- The main photosynthetic pigment, which absorbs light energy, exciting electrons that are used in the light-dependent reactions.
More in Energy for Biological Processes
- ATP
- Chloroplasts
- Photosynthetic pigments
- Cyclic Photophosphorylation
- Non-cyclic Photophosphorylation
- Chemiosmosis
- Calvin Cycle
All 8 lessons in Energy for Biological Processes · All OCR A-level Biology topics