What are the functions of peroxisomes in the cell?

Peroxisomes are membrane–bound vesicles that play an important role in various metabolic pathways. 

• The main function of peroxisomes is oxidation of fatty acids, which are the foremost source of metabolic energy. 
• Peroxisomes also participate in lipid metabolism, catabolism of polyamines, D-amino acids, and bile acids in addition to various oxidative processes. 
• Enzymes present in peroxisomes catalyze both the production and degradation of hydrogen peroxide (H2O2), which is a reactive oxygen species. H2O2 is broken down and converted to water or used to oxidize other organic compounds. 
• In mammals, peroxisomes play a key role in biosynthesis of phospholipids that maintain normal function in the brain and lungs. 
• In plants, peroxisomes prevent loss of energy during photosynthesis. They also generate carbohydrates from stored fatty acids, ensuring that germinating plants get the energy and raw materials necessary for growth.