In which one of the following enzymes is Copper necessarily associated as an activator?

Explanation

Among the given options, the enzyme in which copper is necessarily associated as an activator is lactic dehydrogenase (option C). Carbonic anhydrase: Copper is not associated as an activator in carbonic anhydrase. Carbonic anhydrase is a zinc-containing enzyme that catalyzes the interconversion of carbon dioxide (CO2) and bicarbonate (HCO3-) ions.Copper is not associated as an activator in tryptophanase. Tryptophanase is a pyridoxal phosphate (PLP)-dependent enzyme that catalyzes the conversion of the amino acid tryptophan into indole, pyruvate, and ammonia.Copper is not necessarily associated as an activator in lactic dehydrogenase. Lactic dehydrogenase (LDH) is an enzyme involved in the conversion of pyruvate to lactate during anaerobic glycolysis. Copper is associated as an activator. Tyrosinase is a copper-containing enzyme involved in the biosynthesis of melanin, a pigment responsible for skin, hair, and eye color. To summarize, the correct answer is D. Tyrosinase, as copper is necessarily associated as an activator in this enzyme.