· Sugars, the smallest carbohydrates, serve as fuel and carbon sources. Monosaccharides are the simplest carbohydrates. They are used directly for fuel, converted to other types of organic molecules, or used as monomers for polymers. Disaccharides consist of two monosaccharides connected by a glycosidic linkage.
- · Carbohydrates are of two types
- o 1) simple èmonosaccharides (singles sugars), disaccharides (2 sugars , oligosaccharides (8-10 sugars) or 2)complex (polysaccharides)
- · Polysaccharides, the polymers of sugars, have storage and structural roles. The monosaccharide monomers of polysaccharides are connected by glycosidic linkages. Starch in plants and glycogen in animals are both storage polymers of glucose. Cellulose is an important structural polymer of glucose in plant cell walls. Starch, glycogen, and cellulose differ in the positions and orientations of their glycosidic linkages.
- · The building blocks (monomers) of carbohydrates are simple sugars.