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If the oxygen...

Question

If the oxygen of CO2 (carbon dioxide) is radio labelled and provided to the plant,then which of following will show radioactivity in the cells exposed to sunlight?
1. Hexose 2.H2O 3.O2 4.Nadp⁺

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Solution

During photosynthesis, the water molecule is broken down to produce H+ ion. the oxygen molecule in C6H1206(Hexose) actually comes from the carbon dioxide molecule.
Answer: a) Hexose.

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