This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition & Digestion, Subject name: Biochemistry
Cofactor for dopamine hydroxylase - 
Select and explain. 
A. Fe, B. Mg, C. Mn, D. Cu
D: Cu
Answer: D: Cu 
Explanation: Ans. is 'd' i.e., Cu o Dopamine b-hydroxylase is a 'copper ' containing monooxygenase that requires ascorbic acid and molecular oxygen.o It catalyzes the formation of norepinephrine.