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Light reactions

Light reactions. Chlorophyll molecules in the thylakoid membranes capture light energy. The chloroplasts use the captured energy to remove electrons from water. This splits water into oxygen and hydrogen ions. Light reactions. The oxygen is a waste product and is released from the plant

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Light reactions

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  1. Light reactions • Chlorophyll molecules in the thylakoid membranes capture light energy. • The chloroplasts use the captured energy to remove electrons from water. • This splits water into oxygen and hydrogen ions.

  2. Light reactions • The oxygen is a waste product and is released from the plant • The electrons and the hydrogen ions are used to make NADPH, which is an energy rich molecule that is needed in the Calvin cycle. • The chloroplasts also use the light energy to generate ATP, which is also needed in the Calvin cycle.

  3. Photosynthesis – Light RxN

  4. Light Reactions • Inputs: light energy and water • Outputs: Oxygen (waste product), NADPH and ATP (energy molecules needed in the Calvin Cycle)

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