What is the primary mechanism by which hemoglobin protects against oxidative stress in red blood cells?

A Binding of glutathione
B Catalase activity ✓
C Superoxide dismutase activity
D Heme iron reduction

Explanation

Hemoglobin protects against oxidative stress primarily through the activity of catalase, which breaks down hydrogen peroxide into water and oxygen, thus preventing damage to the cell.

Source

Biochemistry textbooks
Hematology Hematology: Hemoglobin and Oxygen Transport Hematology: Hemoglobin and Oxygen Transport Hard MEDICAL Confidence: high