Which trace element acts as a cofactor for the enzyme superoxide dismutase, protecting cells from oxidative damage?

A Copper
B Zinc ✓
C Manganese
D Selenium

Explanation

Zinc is a cofactor for superoxide dismutase, an enzyme that protects cells from oxidative stress.

Source

Biochemistry by Stryer
Minerals and Trace Elements Trace Element Biochemistry Antioxidant Defense Medium MEDICAL Confidence: high