How are lysosomes formed in a cell?

Lysosomes are formed from the fusion of vesicles from the Golgi complex with endosomes. Endosomes are vesicles that are formed by endocytosis as a section of the plasma membrane pinches off and is internalized by the cell. read more

Cells take up external material in the process pf phagocytosis. This involves creating a vesicle from plasma membrane that will contain the external material. The vesicle enters the cytoplasm where it is called (early) endosome. The cellular membrane components of this endosome are recycled and gave back to the plasma membrane. read more

Lysosomes are present in some eukaryotic, but not prokaryotic, cells (animal cells being eukaryotic cells). Some cell biologists state that lysosomes are not present in plant cells. However, in recent years scientists have reported finding organelles in plant cells that meet the criteria, or most of the criteria, normally used to describe lysosomes in animal cells. read more