Multiple choice Which of the following enzymes contain copper? Arginase Ceruloplasmin Laccase Nitrate reductase 1 and 2 1 and 3 2 and 3 2 and 4 3 and 4 Reveal answer Fill a bubble to check yourself C Correct answer Explanation Ceruloplasmin is an enzyme synthesized in the liver containing 6 atoms of copper in its structure. Laccases are copper-containing oxidase enzymes that are found in many plants, fungi and microorganisms.