Building glycogen from glucose molecules is an example of anabolism.
Anabolism is the set of metabolic pathways that build molecules from smaller units. Energy is required for these types of reactions. Metabolic processes can be either "anabolic" or "catabolic".
Glycogen is polysaccharide which is build from glucose as a smaller units. Glycogen serves as a form of energy storage animals, humans, fungi and bacteria.
