The term sugar is the generic term for any disaccharides and monosaccharides. Sugars are an essential structural component of living cells and a source of energy in many organisms. Sugars are classified based on the number of monomeric units present. The term simple sugars denote to the monosaccharides. The term table sugar or granulated sugar actually refers to sucrose, which is a disaccharide made of two monosaccharides: glucose and fructose. Sucrose is the form of sugar that many people are familiar with. It is used in food preparation, such as in cakes, pastries, and desserts. It is also used as an ingredient in several beverages, such as sodas, coffee, and juices.