During photosynthesis,the oxygen in glucose i | vedclass

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(B) During photosynthesis,the overall reaction is $6CO_2 + 12H_2O \rightarrow C_6H_{12}O_6 + 6H_2O + 6O_2$. Radioactive isotope studies (using $^{18}O

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Carbon dioxide

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(B) During photosynthesis,the overall reaction is $6CO_2 + 12H_2O \rightarrow C_6H_{12}O_6 + 6H_2O + 6O_2$. Radioactive isotope studies (using $^{18}O$) have shown that the oxygen released during photosynthesis comes from water $(H_2O)$. However,the oxygen atoms present in the glucose $(C_6H_{12}O_6)$ molecule are derived from the carbon dioxide $(CO_2)$ molecules used during the Calvin cycle. Therefore,the oxygen in glucose comes from $CO_2$.

During photosynthesis,the oxygen in glucose is derived from which of the following?

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