This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
[{'content': 'The amino acid that produces kinks in the b pleated structure of proteins is \nSelect and explain. \nA. Glycine, B. Serine, C. Proline, D. Alanine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Proline and 4hydroxy proline confer strength to fibrous proteins like collagen,elastin,keratin etc. in their beta pleated structureRef: DM Vasudevan - Textbook of Biochemistry, 7th edition, page no: 244', 'role': 'assistant'}]