Which of the following minerals is essential for the activation of the enzyme delta-aminolevulinic acid synthase (ALAS)?

A Iron
B Zinc ✓
C Copper
D Manganese

Explanation

Zinc is a cofactor for the enzyme ALAS, which is involved in the biosynthesis of heme.

Source

Biochemistry textbooks
Minerals and Trace Elements Biochemistry Enzyme Activation Hard MEDICAL Confidence: medium