If photosynthetic eukaryotic cells are provided with CO₂synthesized with heavy oxygen (¹⁸O), the¹⁸O label may be found in all but one compound. That compound is ____.

Question

Quizplus · Accepted Answer

Oxygen gas (O2) produced during photosynthesis comes from the splitting of water molecules, not from the carbon dioxide (CO2) that incorporates the heavy oxygen into organic molecules. Therefore, O2 would not be labeled with heavy oxygen if it is provided in the form of CO2.

If Photosynthetic Eukaryotic Cells Are Provided with CO2synthesized with Heavy

If Photosynthetic Eukaryotic Cells Are Provided with CO₂synthesized with Heavy