If this figure shows the metabolism of glucose and oxygen to CO2 and H2O, where do the carbon in CO2 and the hydrogen in H2O come from?

Question

Quizplus · Accepted Answer

The carbon in CO2 and the hydrogen in H2O come from glucose, which is broken down through a series of metabolic reactions in the presence of oxygen. CO2 is formed as a result of the carbon atoms in glucose being oxidized, while H2O is formed as a result of the reduction of oxygen and the transfer of electrons and protons to form water molecules. Therefore, choice A is the best answer.

If This Figure Shows the Metabolism of Glucose and Oxygen