Which major food group does cellulose belong to?

Cellulose is primarily classified as a carbohydrate. It is a polysaccharide, which means it is composed of long chains of sugar molecules that are linked together. Specifically, cellulose is made up of glucose units, making it a complex carbohydrate. It plays a crucial role in the structure of plant cell walls and is important for providing dietary fiber in human nutrition, aiding in digestion.

In the context of the other food groups: proteins are made up of amino acids and are essential for growth and repair of tissues; fats provide a concentrated source of energy and are involved in various body functions; vitamins are organic compounds needed in small amounts for numerous biochemical functions in the body. Since cellulose is not related to any of these other categories, its classification as a carbohydrate is well established and significant for understanding its role in nutrition and health.