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': 'The structural proteins are involved in maintaining the shape of a cell or in the formation of matrices in the body. The shape of these proteins is: \nSelect and explain. \nA. Globular, B. Fibrous, C. Stretch of beads, D. Planar', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Fibrous proteins', 'role': 'assistant'}]