Polysaccharide
Many sugar molecules
Polysaccharides are complex biomolecules made of repeating units of monosaccharides that are joined together by glycosidic linkages in a linear or branched structure. They are the most abundant carbohydrate in nature and play essential roles in many cellular processes, including energy storage, structural support, and cell-cell communication.
One example of a polysaccharide is starch, a polymer of glucose. Starch is used by plants as a primary energy storage molecule and can be found in many foods such as potatoes, rice, and bread.
Another example of a polysaccharide is cellulose, a polymer of glucose that makes up the cell walls of plants. Cellulose is indigestible by most organisms, including humans, but it provides structural support to the plant and is an essential component of dietary fiber.
Other important polysaccharides include chitin, which provides structural support in the exoskeletons of arthropods and cell walls of fungi, and glycogen, which is a highly branched polysaccharide used for energy storage in animals.
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