Cofactor of carbonic anhydrase is: (A) Molybdenum, (B) Zinc, (C) Copper, (D) Selenium
Answer is B. The active site of most carbonic anhydrases contains a zinc ion; they are therefore classified as metalloenzymes. One of the functions of the enzyme in animals is to interconve carbon dioxide and bicarbonate to maintain acid-base balance in blood and other tissues and to help transpo carbon dioxide out of tissues.