Which trace element is essential for the proper functioning of the enzyme delta-aminolevulinic acid dehydratase (ALAD)?

A Zinc ✓
B Copper
C Molybdenum
D Lead

Explanation

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

Source

Journal of Biological Chemistry
Minerals and Trace Elements Biochemistry Zinc and Enzyme Function Hard NURSING Confidence: medium