All of the following enzymes may contribute in generating free oxygen radicals within neutrophils for killing intracellular bacteria except?
A. Superoxide dismutase
B. Fenton’s reaction
C. NADPH oxidase
D. Glutathione peroxidase
Correct answer : D. Glutathione peroxidase
- Glutathione peroxidase is a free radical scavenger which converts H2O2 to H2O and O2. It does not generate free radicals.
- Superoxide dismutase converts superoxide (O2–) to H2O2. Hence it is involved in both free radical scavenging and creation.