Yes, that is correct. All cells, whether they are prokaryotic or eukaryotic, have a cell membrane. It's a fundamental component of life.

Here's why:

* Protection: The cell membrane acts as a barrier, separating the cell's internal environment from the external environment. This protects the cell from harmful substances and maintains a stable internal environment.

* Regulation: The cell membrane controls what enters and exits the cell, acting as a selective barrier. This ensures that essential nutrients can enter and waste products can leave.

* Communication: The cell membrane plays a role in cell-to-cell communication, receiving signals from the environment and responding accordingly.

While all cells have a cell membrane, some cells have additional outer layers, like cell walls in plants and bacteria. But the cell membrane is the fundamental structure present in all living cells.