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
Alkaline phosphatase contains 
Select and explain. 
A. Cobalt, B. Zinc, C. Iron, D. Copper
B: Zinc
Answer: B: Zinc 
Explanation: ALP is a nonspecific enzyme which hydrolyzes aliphatic, aromatic or heterocyclic compounds. the pH optimum for the enzyme reaction is between 9 and 10.it is activated by magnesium and manganese. zinc is a constituent ion of ALP.Ref: DM Vasudevan Biochemistry, page no: 305