Linear GLucose Is the second of two types of d Glucose, which is the naturally formed glucose. Instead of forming a hexagon like in Cyclical glucose it is in a straight line. The only difference in the two is the shape. It is a simple sugar and monosaccharide which means it cannot be broken down into smaller molecules and is the smallest form of its CATEGORY. By definition it must have at least three carbon atoms, one attached to an oxygen atom, and the other two bondedd to hydrogen atoms. Glucose is the main building block to sugars such as CELLULOSE and glycogen, as well as Sucrose (table sugar). A TYPE OF CARBOHYDRATE AND THE MOST ImPORTANT SIMPLE SUGAR IN THE HUMAN METABOLISM. Its job once broken down is to create energy for the body, one of the more important jobs being converting adp into atp, without cells would not be able to function properly.