This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Secondary, Tertiary and Quaternary Structure of Proteins, Subject name: Biochemistry
[{'content': 'Quaternary structure of protein is: \nSelect and explain. \nA. 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', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. The inter relation and arrangement of a polypeptides in the protein with more than 2 polypeptides chains)a. Protein that contain two or more polypeptide chains associated by non-covalent forces are said tob. exhibit quaternary structure.c. The arrangement sequence of amino-acids in the polypeptide chain -- is primary structure of protein.d. Inter relation of amino-acids in polypeptide chain is -- secondary structure.', 'role': 'assistant'}]