Peroxisome

Peroxisomes contain amino oxidases, hydroxyacid oxidase and catalase. Oxidases are any of various enzymes that catalyze oxidations. Catalase,a red crystalline enzyme that consists of a protein complex with hematin groups and catalyzes the decomposition of hydrogen peroxide into water and oxygen , protects the cell from hydrogen peroxide damage. This is one reason why the cell contains peroxisomes. Also, peroxisomes contain enzymes involved in lipid metabolism. Peroxisomal enzymes are synthesized on the free cytosolic ribosomes with a signal sequence that directs them to peroxisomes. Peroxisomes reproduce as enzymes are added. With this action, the peroxisome grows and then splits into two smaller peroxisomes.