Multiple choice Which of the following enzymes contain(s) cobalt? Methionyl aminopeptidase Cytochrome oxidase Laccase Isobutyryl-CoA mutase Only 1 1 and 2 2 and 3 Only 4 1 and 4 Reveal answer Fill a bubble to check yourself E Correct answer Explanation This option is correct because Methionyl aminopeptidase and Isobutyryl-CoA mutase are cobalt containing enzymes.