Final answer:
Yes, glucose is used as an energy source. It is an important source of energy for humans, plants, and animals that feed on plants.
Step-by-step explanation:
Glucose (C6H12O6) is indeed used as an energy source.
In humans, glucose serves as an important source of energy. During cellular respiration, energy is released from glucose and used to make adenosine triphosphate (ATP), which is the usable form of energy for cells.
Plants synthesize glucose through photosynthesis and use it for their energy requirements. Humans and other animals that consume plants often store excess glucose as starch, which can be broken down for energy.