Polymers are a large class of molecules which includes plastics, plus many other materials, such as cellulose, amber, and natural rubber. They are studied in the fields of biophysics and macromolecule science, and polymer science Polymers are composition of many repeating subunits. In order to make a polymer, all you need is a molecule that can easily bond to another identical molecule. Polymers, both natural and synthetic, are created from many small molecules, known as monomers(Monomers are small molecule which may be joined together in a repeating fashion to form polymers.) Monomers form polymers by forming chemical bonds or binding supra-molecularly through a process called polymerization, chemical groups are lost from the monomers so that they may join together. Their consequently large molecule mass relative to small molecule compounds produces unique physical properties, including toughness, viscoelasticity, and a tendency to form glasses and semi-crystalline structures. Due to their properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life. Polymers range from familiar synthetic plastic such as polystyrene (transparent and thermoplastic), synthetic fibers, synthetic rubbers to natural biopolymers such as DNA, cellulose, starch, rubber and proteins that are fundamental to biological structure and function.