Which trace element is important for the proper functioning of the immune system and acts as a cofactor for various enzymes involved in immune response?

A Zinc ✓
B Iron
C Copper
D Molybdenum

Explanation

Zinc is crucial for immune function, playing a role in the activation of cells important for immunity and acting as a cofactor for enzymes that help in the immune response.

Source

Biochemistry textbooks
Minerals, and Trace Elements Biochemistry Immune System Function Medium MEDICAL Confidence: high