Classification of Carbohydrates Monosaccharides or simple sugars: polyhydroxyaldehydes or aldoses polyhydroxyketones or ketoses Disaccharides can be hydrolyzed to two monosaccharides. Polysaccharides hydrolyze to many monosaccharide units.For example, starch and cellulose have 1000 glucose units. Chapter 23 3 Chapter 23 3 Classification of Carbohydrates ▪ Monosaccharides or simple sugars: ▪ polyhydroxyaldehydes or aldoses ▪ polyhydroxyketones or ketoses ▪ Disaccharides can be hydrolyzed to two monosaccharides. ▪ Polysaccharides hydrolyze to many monosaccharide units. For example, starch and cellulose have > 1000 glucose units