These leaves are carrying out photosynthesis by absorbing sunlight and using its energy to make sugars and oxygen. Chlorophyll, located in chloroplasts absorb the light. Chlorophyll a is involved directly in the light reactions of photosynthesis, and it is a blue-green photosynthetic pigment. Energy is transfered to chlorophyll a by chlorophyll b, which is a yellow-green accessory photosynthetic pigment.
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