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': 'In proteins the α-helix and β-pleated sheet are examples of: \nSelect and explain. \nA. Primary structure, B. Secondary structure, C. Tertiary structure, D. Quaternary structure', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The term “secondary structure” denotes the configurational relationship between residues, which are about 3–4 amino acids apart in the linear sequence.\nReference: Vasudevan 7th\xa0 ed, pg 36', 'role': 'assistant'}]