During cellular respiration, the molecule that is broken down is sugar.
The correct answer is sugar. During cellular respiration, the process by which cells convert glucose (a type of sugar) into usable energy, the covalent bonds of glucose molecules are broken down. This breakdown of glucose ultimately produces carbon dioxide, water, and ATP (adenosine triphosphate) molecules, which are utilized as energy currency by the cells. Thus, sugar is the molecule that is broken down during cellular respiration.
