Which of the following is not an example of a polysaccharide?

Fructose is not an example of a polysaccharide because it is a monosaccharide, which means it is a simple sugar composed of a single sugar unit. Monosaccharides like fructose and glucose serve as the building blocks for more complex carbohydrates. In contrast, polysaccharides are long chains of monosaccharide units linked together through glycosidic bonds, which give them unique properties and functions in living organisms.

Starch, cellulose, and glycogen are all polysaccharides, as they consist of multiple glucose units linked together. Starch serves as a storage form of energy in plants, cellulose provides structural support in plant cell walls, and glycogen serves a similar energy storage role in animals. Understanding the distinction between monosaccharides and polysaccharides helps clarify the classification of carbohydrates and their roles in biological systems.