Multiple choice

Which of the following pairs of metalloenzyme and metal cofactors are incorrectly matched?

P. Tyrosinase : Copper Q. Urease : Copper R. Dopamine β-hydroxylase : Nickel S. Catechol dioxygenase : Iron

  1. P and Q

  2. P and S

  3. Q and R

  4. Q and S

  5. R and S
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This option is correct because urease is a nickel-containing metalloenzyme of high molecular weight that catalyses the hydrolysis of urea into carbon dioxide and ammonia, and dopamine β-hydroxylase is a copper-containing enzyme that synthesises norepinephrine from dopamine.

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