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
Glutamine replaced by valine in sickle cell anaemia is characterized by 
Select and explain. 
A. Non sense mutation of beta chain, B. Missense mutation of beta chain, C. Degradation of beta chain, D. Deletion of beta chain
B: Missense mutation of beta chain
Answer: B: Missense mutation of beta chain 
Explanation: None