Polysaccharides are a long chain ofmonosaccharides联系在一起glycosidic bonds(poly- = “many”). The chain may be branched or unbranched, and it may contain different types of monosaccharides. The molecular weight may be 100,000 daltons or more, depending on the number of monomers joined.

Starch,glycogen,cellulose,fiber, and chitin are primary examples of polysaccharides.