Final answer:
During cellular respiration, the carbon atoms in glucose are incorporated into carbon dioxide.
Step-by-step explanation:
The carbon atoms in glucose are ultimately incorporated into carbon dioxide during cellular respiration. This process occurs in the final stage of cellular respiration called the Krebs cycle or the citric acid cycle. During the Krebs cycle, the carbon atoms from glucose are released as carbon dioxide, which is then exhaled as a waste product.
It is important to note that while glucose is the initial molecule that enters cellular respiration, it undergoes multiple stages and transformations, including glycolysis and the Krebs cycle, before being completely oxidized and converted into carbon dioxide.