The monomers (building blocks) of carbohydrates are called monosaccharides. Monosaccharides are simple sugars that cannot be hydrolyzed into smaller carbohydrate units. Common examples of monosaccharides include:
- Glucose - A primary energy source for cells, commonly found in blood.
- Fructose - A sugar found in many fruits; often referred to as fruit sugar.
- Galactose - A component of lactose, the sugar found in milk.
Monosaccharides can combine to form disaccharides (like sucrose and lactose) and polysaccharides (like starch, glycogen, and cellulose) through glycosidic bonds.