5.Protein polymers are not strung out as intertwined cords, but are folded in precise and explicit ways. The particular architecture of this elaborate protein-folding is vital to the biological function of each protein hormone or enzyme. If not folded in its critically precise way, the protein cannot carry out its specific mission(s), and may become toxic to its organism. The complexity of protein folding (tertiary structure below) might best be visualized in our imagination by comparison to origami.