BI-780
Role of chlorophyll
Biology · Secondary 3 · Hard · Role of chlorophyll
In an investigation on photosynthesis, a student shines light of different colours on a healthy green plant and measures the rate of oxygen production. Under red and blue light, the rate is high, but under green light, the rate is very low. Which statement best explains this result?
- Chlorophyll reflects red and blue light, so they cannot be used for photosynthesis.
- Chlorophyll absorbs green light best, so green light is used up quickly.
- Chlorophyll absorbs red and blue light better than green, so photosynthesis is faster in red and blue light.
- Chlorophyll only absorbs ultraviolet light, so visible light has little effect.
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