Biochemistry Quaternary structure of protein is: A The arrangement sequence of amino acids in the polypeptide chain B Inter relation between amino acids in a single polypeptide chain C Inter relation of amino acid in 2 polypeptide chains D The inter relation and arrangement of polypeptides in a protein with more than 2 polypeptides chains 💡 Explanation Quaternary structure of protein is: ✓ Correct Answer: D. The inter relation and arrangement of polypeptides in a protein with more than 2 polypeptides chains