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One radioactive isotope of oxygen, O18, is utilized as a reactant, and the products generated in the reaction are investigated.
To track the destiny of oxygen atoms during photosynthesis, a heavy isotope is used as a tracer. The investigations demonstrated that only when water was the source of the tracer did the O2 from plants get labeled with 18O.
Ruben and Kamen are the right response. Ruben and Kamen established that water is the source from which oxygen developed during photosynthesis. The splitting of water molecules to release oxygen molecules is referred to as photolysis, which is an oxidation of water.
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