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4.4 identify the role of chlorophylls in the light reactions
identify the role of chlorophylls in the light reactions
- Chlorophylls are excellent light absorbers because they possess delocalised electrons (in π orbitals above and below a planar ring structure). The electrons are “excited” or “jump up” to a higher energy level when light is absorbed by the chlorophyll molecule. The chlorophylls and accessory pigments in the antenna complex pass the energy from these excited electrons by resonance transfer to other molecules in the complex until it reaches the reaction centre.