Through the use of oxygen -18 (heavy oxygen), | vedclass

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(B) The oxygen released during photosynthesis originates from water molecules. During the light-dependent reactions of photosynthesis,light energy is

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water

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(B) The oxygen released during photosynthesis originates from water molecules. During the light-dependent reactions of photosynthesis,light energy is captured by chlorophyll in the chloroplasts. This energy facilitates the photolysis of water,which is the splitting of water molecules into protons,electrons,and oxygen gas.The chemical process is represented as:$4H_2O \rightleftharpoons 4H^+ + 4OH^-$$4OH^- \xrightarrow{Mn^{2+}, Cl^-} 2H_2O + O_2 \uparrow + 4e^-$

Through the use of oxygen $-18$ (heavy oxygen),scientists have found that the oxygen released during photosynthesis comes from molecules of

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