Final answer:
During cellular respiration, glucose and oxygen are converted into carbon dioxide, water, and ATP. The products have less energy than the reactants due to the energy captured and stored in ATP.
Step-by-step explanation:
During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP. The reactants of cellular respiration are oxygen and glucose, while the products are carbon dioxide, water, and ATP. The amount of energy in the cellular respiration products is less than the amount of energy in the reactants because some energy is captured and stored in ATP.