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: Pathology
In muscle hyperophy alpha myosin changes to ? 
Select and explain. 
A. Beta, B. Gamma, C. Theta, D. Delta
A: Beta
Answer: A: Beta 
Explanation: Answer- A. Beta During muscle hyperophy the alpha isoform of myosin heavy chain is replaced by the beta isofom, which has a slower, more energetically economical contraction.