Question

This cell structure contains catalases, specific enzymes devoted to the detoxification of peroxide: A. Golgi apparatus B. Mitochondria C. Peroxisome D. Lysosome

Answer 1

Catalase is the enzyme that is present in all living organisms which, are exposed to oxygen. The decomposition of hydrogen peroxide into oxygen and water is catalyzed by the catalase enzyme. The cell is protected from the oxidative damage by this enzyme.

Incorrect: The cheif enzyme present in the Golgi apparatus is alkaline phosphatase instead of catalase.

Mitochondria produce hydrogen peroxide but do not have the effective catalase activity. This is because most of the mitochondrial cell lack the catalase enzyme.

Lysosomes have a role in metabolism and they contain a enzyme called hydrolase which, is responsible for digestion.

Hence the options (A), (B), and (D) are incorrect.

Correct: The fusion of vesicles that are released by the endoplasmic reticulum and mitochondria give rise to peroxisomes. Peroxisomes contain large amount of catalase enzyme that protect the cell from oxidative damage by decomposing the hydrogen peroxide into water and oxygen.

Hence, the option (C) is correct.