Water oxidation is the primary reaction of both natural and artificial photosynthesis. The role of H2O, or water, in photosynthesis, is essential to ATP, which is the energy process that drives photosynthesis. Trending Questions. The mechanism by which water is oxidized occurs through a 5 stage Kok cycle illustrated below? 2H 2 O → 2H 2 + O 2 Total Reaction . Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. Photosynthetie water oxidation is unique to plants and cyanobacteria, it occurs in thylakoid membranes. So this is an oxidation reaction Ask Question + 100. Water oxidation is one of the half reactions of water splitting: . Relevance. Developing active and robust water oxidation catalysts (WOCs) is the key to constructing efficient artificial photosynthesis systems, but it is still facing enormous challenges in both fundamental and applied aspects. 2H 2 O → O 2 + 4H + + 4e − Oxidation (generation of dioxygen) . what is water oxidized to in photosynthesis? Join. Electrons could be used to reduce a variety of molecules such as H 2 O, CO, CO 2 or N 2 to produce useful compounds in artificial photosynthesis . Answer Save. Contribution of water oxidation to the ATP synthesis. 4H + + 4e − → 2H 2 Reduction (generation of dihydrogen) . This transforms the water … 10 years ago. In water oxidation, in addition to oxygen release, electrons and protons are also produced. The energy of the resulting electrons and protons released during water oxidation is then stored as the biological equivalent of hydrogen. S. Lv 7. Favorite Answer. Water is oxidized during photosynthesis.Oxidation number of O changes from -2 to 0. In nature, the oxygen-evolving complex (OEC), a Mn 4 Ca cluster in the enzyme Photosystem II catalyzes this transformation. During photosynthesis, plants take in carbon dioxide (CO 2) and water (H 2 O) from the air and soil. 1 Answer. The Sn states in the Kok diagram denote different discrete oxidation states where n the number of oxidative “equivalent” stored in the OEC during cycle progression. Still have questions? It is also important in the making of food; hydrogen atoms found in water make up part of the glucose molecules that plants use as nourishment. Trending Questions. Source(s): S. 1 0. O2. Figure: Kok Cycle. Get your answers by asking now. Water-oxidation catalysts mediate the four-electron, four-proton oxidation of water to dioxygen.. Answer: During oxygenic photosynthesis, light energy transfers electrons from water (H2O) to carbon dioxide (CO2), to produce carbohydrates. 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