This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Physiology
Skeletal frame work of a cell is maintained by: 
Select and explain. 
A. Nucleus, B. Microtubules, C. Ribosomes, D. Mitochondria
B: Microtubules
Answer: B: Microtubules 
Explanation: Ans. (b) Microtubules(Ref: Ganong, 25th ed/p.39)Microtubules provide structural support that can determine the shape of the cell and resist forces that tend to deform it