Which group does not include polysaccharides?

The correct answer is that glucose does not belong to the group of polysaccharides because glucose is a simple sugar, specifically a monosaccharide. Monosaccharides are the most basic form of carbohydrates and consist of single sugar molecules. They serve as the building blocks for more complex carbohydrates.

On the other hand, starch, glycogen, and cellulose are all polysaccharides, which are long chains of monosaccharide units linked together. Starch is a storage form of glucose primarily found in plants, glycogen serves a similar purpose in animals, and cellulose is a structural component of the cell wall in plants. Understanding the distinction between monosaccharides and polysaccharides is fundamental in the study of carbohydrates and their functions in nutrition.