Where does the oxygen come from that is produced as a by-product of photosynthesis? A)from the reduction of CO₂ B)from breakdown of water C)from the breakdown of carbohydrates D)from the Calvin cycle

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Quizplus · Accepted Answer

Oxygen is produced as a by-product of photosynthesis through the breakdown of water molecules. This process is called photolysis, which occurs in the thylakoid membrane of chloroplasts during the light-dependent reactions of photosynthesis. The water molecules are split into oxygen, protons (H+ ions), and electrons by the energy from light. The oxygen released during this process is what we breathe in.

Where Does the Oxygen Come from That Is Produced as a By-Product