Q.26 Catalase is found exclusively in
(A)Lysosomes
(B) Golgi apparatus
(C) Peroxisomes
(D) Mitochondria

Catalase, a vital enzyme that decomposes hydrogen peroxide into water and oxygen, resides primarily in peroxisomes within eukaryotic cells. This protects cells from oxidative damage caused by reactive oxygen species. The correct answer to the multiple-choice question is (C) Peroxisomes.

Correct Answer

Catalase is found exclusively in (C) Peroxisomes. Peroxisomes specialize in oxidizing fatty acids and detoxifying hydrogen peroxide using high catalase concentrations, making them the primary site in most cells.

Lysosomes Explanation

Lysosomes contain hydrolytic enzymes for breaking down macromolecules but lack catalase. They handle intracellular digestion, not peroxide detoxification.

Golgi Apparatus Role

The Golgi apparatus modifies, sorts, and packages proteins and lipids for secretion or use. It does not house catalase or perform oxidative reactions.

Peroxisomes Function

Peroxisomes contain oxidases that produce hydrogen peroxide and catalase to neutralize it immediately. This exclusive localization prevents cellular damage from free radicals.

Mitochondria Details

Mitochondria generate ATP via respiration and produce some reactive oxygen species, but catalase is not exclusive or primary there. Peroxisomes dominate catalase activity.