Chloroplasts
Chloroplasts are the site of photosynthesis. Chloroplasts are disc-shaped, 2-10 μm long, 1μ in diameter and are surrounded by a double membrane.

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Key terms in this lesson
- 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
- Photosynthetic pigments
- Photosystems
- Cyclic Photophosphorylation
- Non-cyclic Photophosphorylation
- Chemiosmosis
- Calvin Cycle
All 8 lessons in Energy for Biological Processes · All OCR A-level Biology topics