Catabolic simply means the breakdown of this is different than anabolic, which means the synthesis of. Now, although there are many different types of sugars that exist in nature, we have five member sugars, we have six member sugars and so forth. The most common type of sugar, monomer of sugar that is used by the body is glucose. In fact, when the majority of the cells take in that non glucose molecule, they normally convert, transform the non glucose into glucose. And this takes place in liver cells as well as intestinal cells in our intestines, in the liver, in our body. Now, glucose can be broken down and transformed into ATP molecules and ATP is used for energy.