This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Enzymes, Subject name: Biochemistry
[{'content': 'Cell shape and motility are provided by \nSelect and explain. \nA. Microfilaments, B. Microtubules, C. Golgi apparatus, D. Mitochondria', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Microtubules are polymers of tubulin that form pa of the cytoskeleton and provide structure and shape to cells', 'role': 'assistant'}]