General ---------Biology----------------------------------------------------- ------------------Online----------------------------- Ch. 5 Macromolecules:  carbohydrates, fats, proteins, nucleic acids

Carbohydrate molecules serve to store energy for use in the cell or to provide structural support for plant and animal tissues.  Carbohydrate molecules are either single sugars (monosaccharides), double sugars (disaccharides) or multiple sugars (polysaccharides).