This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Tertiary structure of a protein describes \nSelect and explain. \nA. The order of amino acids, B. Location of disulphide bonds, C. Loop regions of proteins, D. The ways of protein folding', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Secondary structure denotes the configurational relationship between residues which are about 3–4 amino acids apart; or secondary level defines the organization at immediate vicinity of amino acids.\nThe tertiary structure denotes three dimensional structure of the whole protein.\n\nReference: Vasudevan 7th\xa0 ed, pg 38', 'role': 'assistant'}]