Peroxiosomes
How Peroxiosomes are work(and Explain)
peroxisomes are smaller than lysosomes and carry different group of enzymes. in contrast to lysosomes, which are produced at the Golgi appartus new peroxisomes are produced by the growth and subdivision of existing peroxisomes. their enzymes are produeced at free ribosomes and transported from the cytosol into the peroxisomes by carrier proteins.
- peroxisomes absorb and break down fatty acids and other organic compounds as they do so peroxisomes generate hydrogen peroxide a potentially dangerous free radical.
- other enzymes within the peroxisom then break down the gydrogen peroxide to oxygen and water.
- Peroxisomes thus protect the cell from the potentially damaging effects of free radicals produced during catabolism. while these organelles are present in all cells their numvers a rehighest in metabolically active cells such as liver cells.
- Peroxisomes play two particularly important roles in plants. First, peroxisomes in seeds are responsible for the conversion of stored fatty acids to carbohydrates, which is critical to providing energy and raw materials for growth of the germinating plant. This occurs via a series of reactions termed the glyoxylate cycle,
why peroxisomes are important
being a strong oxidizing agent, could prove toxic if allowed to accumulate. To prevent this, eukaryotic cells have enclosed the enzymes producing peroxides within a membrane-bound organelle, the peroxisome, which is similar in size and appearance to a lysosome. Peroxisomes also contain high concentrations of peroxidase whose function is to reduce the peroxide to water, rendering it harmless.