Describe lysosome.

- Small membrane-bound organelle (25nm–1µm). - The cell's digestive organelle. - Contains ~50 different types of hydrolytic enzymes to digest every type of biological macromolecules. - All enzymes are acid hydrolases –> pH 4.6 in the lysosomal compartment. - Has a high internal proton concentration (low pH) maintained by a proton pump at the membrane. - Has highly glycosylated integral proteins that serve as a protective lining.