* Eukaryotic cells: These are complex cells found in plants, animals, fungi, and protists. They do have a nucleus and a cell membrane.

* Nucleus: Contains the cell's DNA and controls its activities.

* Cell membrane: Encloses the cell, regulating what enters and exits.

* Prokaryotic cells: These are simpler cells found in bacteria and archaea. They do not have a nucleus, but they do have a cell membrane.

* DNA: Located in a region called the nucleoid, but not enclosed by a membrane.

* Cell membrane: Encloses the cell, controlling the movement of substances.

So, in short:

* Eukaryotic cells have both a nucleus and a cell membrane.

* Prokaryotic cells have a cell membrane but lack a true nucleus.