33.Glucose is broken down through cellular respiration, which involves a large number of chemical reactions. At the end of the cellular respiration process, a large number of ATP molecules are generated, but yet, not all of the possible energy that is contained in a molecule of glucose can be harnessed through these chemical reactions to generate ATP. In other words, during cellular respiration, not all of the energy that is contained in a molecule of glucose is converted into the energy stored in ATP. What happens to the remaining energy?

Cellular respiration may be defined as the set of the metabolic reactions that are used to convert the biochemical energy into ATP. The reactions are generally exothermic in nature.

Large amount of ATP are generated at the end of the reaction but not all amount of energy is converted to ATP. The remaining energy may be lost in the form of heat.

Thus, the answer is energy is lost as heat.