Final answer:
Glucose is produced during photosynthesis and serves as a reactant in cellular respiration.
Step-by-step explanation:
In photosynthesis, glucose is produced as the end product. Glucose is a carbohydrate that serves as a source of energy. In cellular respiration, glucose is broken down to release energy. Therefore, glucose is both produced during photosynthesis and used as a reactant in cellular respiration.
Learn more about Glucose production and utilization in photosynthesis and cellular respiration