1. Starch - a polysaccharide found in plants that serves as a storage form of energy. 2. Cellulose - a polysaccharide found in the cell walls of plants that provides structural support. 3. Glycogen - a polysaccharide found in animals that serves as a storage form of energy in the liver and muscles. 4. Chitin - a polysaccharide found in the exoskeletons of insects and crustaceans that provides structural support. 5. Agar - a polysaccharide derived from seaweed that is used as a thickening agent in food and microbiology.