A macromolecule is the large molecules necessary for life, include carbohydrates, lipids, nucleic acids, and proteins. Protein has four levels to its structure; Primary, Secondary, Tertiary, and Quaternary. Primary is a straight chain, Secondary is held by hydrogen bonds, Tertiary is called subunits, and Quaternary is composed of two or more subunits. Two examples of proteins are actin and collagen. “Actin is a globular multi-functional protein that forms microfilaments. It is found in essentially all eukaryotic cells.”(NCBI. NMH) “Collagen is a part of the connective tissue that in the skin helps in firmness, suppleness and constant renewal of skin cells.”(News Medical Net). The process of monomers joining to form polymers is called dehydration