In animals, polysaccharides are primarily stored in the form of?

In animals, polysaccharides are primarily stored in the form of glycogen. Glycogen is a highly branched polymer of glucose and serves as a key energy reserve. When animals need energy, enzymes break down glycogen in the liver and muscle tissues to release glucose, which can then be used for immediate energy needs or for metabolic processes.

Cellulose, while a polysaccharide, is primarily found in plants and serves as a structural component of the cell wall, making it unsuitable for energy storage in animals. Starch is also a storage form of glucose, but it is predominantly found in plants. Sucrose, on the other hand, is a disaccharide composed of glucose and fructose and is used as a transport sugar in plants rather than a storage form in animals. Consequently, glycogen is the correct answer as it specifically pertains to energy storage in animal tissues.