(A) A specialised differentiated form of cell membrane.
(B) These are essentially infoldings of cell membrane.
(C) Helps in cell wall formation, respiration, secretion process, to increase surface area of plasma membrane and enzymatic content.
The above features (A-C) are attributed to which of the given structures of prokaryotic cell?

Mesosome is formed by the extension of plasma membrane into the cell. These extensions are in the form of vesicles, tubules and lamellae. They help in cell wall formation, DNA replication and distribution to daughter cells. They also helps in respiration, secretion process, to increase surface area of plasma membrane and enzymatic content.