Probably hazardous hydrolytic enzymes operating in acidic circumstances (pH 5) are segregated during the lysosomes to safeguard the opposite parts on the cell from random destruction. Lysosomes are sure by one phospholipid bilayer membrane. They change in measurement and so are formed by the fusion of Golgi-derived vesicles with endosomes https://opaldaily.com/recombinant-antibody-production-the-role-of-mammalian-cell-systems/