In a bacterial cell, the plasma membrane often extends into the cytoplasm to form a specialised structure. These membranous extensions are typically found in the form of:

Step-by-step solution

In prokaryotic cells such as bacteria, a special membranous structure called the mesosome is formed by the extensions of the plasma membrane into the cell. These extensions are typically found in the form of vesicles, tubules, and lamellae. They help in cell wall formation, DNA replication and distribution to daughter cells, respiration, secretion processes, to increase the surface area of the plasma membrane and enzymatic content. Answer: Vesicles, tubules and lamellae