Final answer:
Glycogen synthetase enzyme is activated by excess glucose and plays a key role in glycogenesis, which is the synthesis of glycogen from glucose. Glycogen is used as an energy storage molecule in animals and is stored in liver and muscle cells.
Step-by-step explanation:
The subject of the question is Biology and the grade level is High School.
Glycogen synthetase enzyme is activated by excess glucose. This enzyme plays a key role in glycogenesis, which is the synthesis of glycogen from glucose. When there is excess glucose in the body, the glycogen synthetase enzyme is activated to convert that glucose into glycogen for storage.
Glycogen is a storage molecule in animals and is stored in liver and muscle cells. During periods of excess glucose, glycogen is formed and stored for later use when there is a scarcity of food or during exercise when ATP production is needed for a longer period of time.