What is the primary mechanism by which hemoglobin is protected from oxidative damage?

A Binding of nitric oxide
B Presence of antioxidant enzymes ✓
C Chelation of iron ions
D Formation of methemoglobin

Explanation

Hemoglobin is protected from oxidative damage primarily through the presence of antioxidant enzymes such as superoxide dismutase and catalase, which neutralize reactive oxygen species.

Source

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