From where does the O2 released during the light reactions of photosynthesis come?

Name: From where does the O2 released during the light reactions of photosynthesis come?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The oxygen released during the light reactions of photosynthesis comes from the splitting of water (H2O) molecules, not from carbon dioxide (CO2) or any other source. This process is known as photolysis, where water molecules are split into hydrogen ions, electrons, and oxygen in the presence of light.

From Where Does the O2 Released During the Light Reactions