Peroxisomes are small, membrane-bound organelles found in the cytoplasm of eukaryotic cells. They play a crucial role in various metabolic processes, including:

* Breakdown of fatty acids: Peroxisomes contain enzymes that break down long-chain fatty acids into shorter chains, which can then be used by other organelles for energy production.

* Detoxification: They detoxify harmful substances, such as alcohol and drugs, by converting them into less harmful compounds.

* Production of hydrogen peroxide: As a byproduct of these metabolic processes, peroxisomes generate hydrogen peroxide (H₂O₂).

While hydrogen peroxide is a toxic molecule, peroxisomes also contain the enzyme catalase, which breaks down hydrogen peroxide into water and oxygen, preventing its accumulation and potential damage to the cell.