Final answer:
ATP (adenosine triphosphate) is the primary molecule used to store the energy released during cellular respiration.
Step-by-step explanation:
During cellular respiration, the primary molecule used to store the energy that is released is ATP (adenosine triphosphate). ATP serves as the primary energy currency in cells and stores energy in phosphate ester bonds. It releases energy when the phosphodiester bonds are broken, converting ATP to ADP and a phosphate group. ATP is produced through metabolic reactions in cellular respiration, where carbohydrates, proteins, and fats are broken down. Glucose, for example, is converted to pyruvic acid, transferring some of its chemical potential energy to ATP and NADH.