NEETBotanyCell - The Unit of Life
Most prokaryotic cells have a chemically complex cell envelope consisting of a tightly bound three-layered structure. Which specific layer of this envelope undergoes extension into the cytoplasm to form the structure that helps in DNA replication and its distribution to daughter cells?
Options
- APlasma membrane
- BCell wall
- CGlycocalyx
- DOuter membrane
Correct answer
A. Plasma membrane
Step-by-step solution
The structure that helps in DNA replication and its distribution to daughter cells in prokaryotes is the mesosome. According to NCERT, a special membranous structure is the mesosome which is formed by the extensions of the plasma membrane into the cell. These extensions are in the form of vesicles, tubules and lamellae. The cell envelope consists of a tightly bound three-layered structure: the outermost glycocalyx, followed by the cell wall and then the plasma membrane. It is the innermost layer (plasma membrane) t