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
In which of the following reactions is magnesium required 
Select and explain. 
A. ATPase, B. Dismutase, C. Phosphatase, D. Aldolase
C: Phosphatase
Answer: C: Phosphatase 
Explanation: Magnesium is required for kinases (e.g. hexokinase, PFK, creatine kinase),phosphatases (glucose-6-phosphatase), enolase.