Final answer:
Glucose is the primary fuel for cellular respiration, ATP is used to store energy released, chlorophyll absorbs photon energy in photosynthesis, and glucose has the most potential energy for ATP production.
Step-by-step explanation:
The molecule that serves as the primary fuel for cellular respiration is glucose. During cellular respiration, energy is released from glucose, and this energy is stored in the form of ATP (adenosine triphosphate), which is the primary molecule used to store energy within cells. In photosynthesis, the molecule that absorbs the energy of a photon is chlorophyll, which initiates the process of converting light energy into chemical energy stored in carbohydrates such as glucose. Of the options provided, the molecule likely to have the most potential energy is glucose, as it has multiple carbon-hydrogen bonds that can be broken down to release energy for ATP production during cellular respiration.