Which trace element is essential for the proper functioning of the enzyme delta-aminolevulinic acid synthase?

A Zinc
B Iron ✓
C Copper
D Molybdenum

Explanation

Iron is a crucial component of the enzyme delta-aminolevulinic acid synthase, which plays a key role in heme synthesis.

Source

Harper's Illustrated Biochemistry
Minerals and Trace Elements Biochemistry Heme Synthesis Hard MEDICAL Confidence: high