Biomolecules Question 68
68. In which one of the following enzymes, is copper necessarily associated as an activator?
(a) Carbonic anhydrase
(b) Tryptophanase
(c) Lactic dehydrogenase
(d) Tyrosinase
Show Answer
Answer : d
Hints & Solutions
(d) Tyrosinase (polyphenol oxidase, catecholase) is a copper-containing oxidase which is widely distributed in plants, animals and man. It oxidizes tyrosine to the pigment melanin in mammals and causes the cut surfaces of many fruits and vegetables to darken (browning reactions).
