AP BIOLOGY

Detailed explanation-1: -During photosynthesis, water is oxidized to release oxygen and carbon dioxide is reduced to form sugar. The twelve molecules of water release six molecules of oxygen along with the formation of one molecule of hexose .

Detailed explanation-2: -During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons.

Detailed explanation-3: -Water is oxidized to liberate oxygen in the presence of light (photolysis), whereas carbon dioxide is reduced to carbohydrates in the dark utilizing energy trapped during the light reaction. During photosynthesis, CO2 is reduced to glucose, and H2O is oxidized to release O2.

Detailed explanation-4: -Photosynthesis involves oxidation and reduction by oxidizing the oxygen in water and reducing the carbon in carbon dioxide.

Detailed explanation-5: -The water oxidation to evolve dioxygen is catalyzed at the oxygen-evolving center (OEC) in photosystem II (PS II) in photosynthesis.