Mesosome is a convoluted membranous structure formed in a prokaryotic cell by the invagination of the plasma membrane. Its functions are as follows:
These extensions help in the synthesis of the cell wall, replication of DNA. They also help in the equal distribution of chromosomes into the daughter cells.
It also increases the surface area of the plasma membrane to carry out various enzymatic activities.
It helps in secretion processes as well as in bacterial respiration.