Monomers are single units while polymers are monomers linked together. So with polysaccharides being polymers or monomers linked together, then think of a single monomer of sugar such as maltose. When you link a bunch of maltose together then they form a polysaccharide polymer of sugars. Glycogen is an example of a polymer of sugars. Glycogen is the body method of sugar storage in your liver and muscle tissue.