Answer:
Provide support and energy
Step-by-step explanation:
Polysaccharides are made up of many monosaccharides the common types include starch, cellulose, glycogen, chitin and lignin. Starch is present as stored food in plant tissues and can be hydrolysed into monosaccharides to provide energy.
Cellulose and chitin are structural components. They give the plan cells their definite shape and the exoskeleton in arthropods respectively.