Which trace element is required for the proper functioning of the enzyme glutathione peroxidase?

A Selenium ✓
B Manganese
C Molybdenum
D Chromium

Explanation

Selenium is a cofactor for the enzyme glutathione peroxidase, which helps to protect cells from oxidative damage.

Source

Nutrition: An Applied Approach
Minerals and Trace Elements Nutrition Antioxidant Defenses Easy MEDICAL Confidence: high