Here's why it's important:

* Protection: The cell membrane acts as a barrier, separating the cell's internal environment from its surroundings. This helps maintain the cell's structure and protects it from harmful substances.

* Regulation: The cell membrane controls what goes in and out of the cell. It acts like a gatekeeper, allowing nutrients to enter and waste products to leave. This is crucial for the cell's survival and proper functioning.

* Communication: The cell membrane plays a role in communication between the cell and its environment. It has receptors that can bind to signals from other cells or molecules, triggering responses within the cell.

Key points:

* Bacteria have a cell membrane, just like all other living cells.

* The cell membrane is a thin, flexible layer that surrounds the cell.

* It is composed mainly of phospholipids and proteins.

* The cell membrane is vital for the survival and function of bacteria.