Question

Order the steps to make a protein with more than one polypeptide chain.
first
alpha helices and beta sheets fold into a three-dimensional structure
parts of a polypeptide chain fold into shapes like an alpha helix
amino acids assemble into a polypeptide chain
several polypeptide chains assemble to form the folded

Answer 1

1) Amino acids assemble into a polypeptide chain. (Primary structure)
2) Parts of a polypeptide chain fold into shapes like an alpha helix or beta sheet. (Secondary structure)
3) Alpha helices and beta sheets fold into a three-dimensional structure. (Tertiary structure)
4) Several polypeptide chains assemble to form the folded protein. (Quaternary structure)