Here's the breakdown:

* Cell membrane: This is a thin, flexible layer that surrounds all cells, including bacteria. It acts as a barrier, controlling what enters and leaves the cell.

* Bacterial cell: This is a complete, living organism with various components, including a cell membrane, cytoplasm, DNA, and sometimes a cell wall.

Think of it this way: The cell membrane is like the wall of a house, while a bacterial cell is the entire house with all its rooms and furniture. The cell membrane is a part of a bacterial cell, but not the cell itself.