The light reaction breaks ____.

water into oxygen to generate ATP

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carbon dioxide into oxygen to generate ATP

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carbon dioxide into oxygen to produce glucose

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oxygen intothe water to generate ATP

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Solution

The correct option is A
water into oxygen to generate ATP

The light reaction breaks/splits water molecules to generate oxygen and hydrogen ion/ proton. To break the strong bond of water molecule, immense amount of energy is required, which is obtained from the sunlight. Hydrogen ion/proton which was released by splitting of the water is used to make the energy currency of the cell- ATP.

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