An example of a preventive antioxidant is_______________?
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Answer: A. Catalase
Explanation
Catalase acts as a preventive antioxidant by destroying reactive peroxides. It converts harmful hydrogen peroxide into harmless water and oxygen molecules. This prevents the formation of dangerous hydroxyl radicals in cells. Antioxidants protect biological tissues from oxidative stress and cellular damage. Preventive antioxidants stop free radical reactions before they can even start. Catalase is an essential enzyme found widely in aerobic living organisms.
Cellular biology studies rely on catalase to understand oxidative defense mechanisms. Medical researchers investigate antioxidant enzymes in relation to aging processes. Biochemical assays use catalase to neutralize hydrogen peroxide in solutions. Option B tocopherol functions primarily as a chain breaking antioxidant. Option C superoxide dismutase converts superoxide radicals into oxygen and peroxide. Option D urate acts as an antioxidant scavenger in human blood plasma.
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