We also have something called a cell membrane, which is basically responsible in cell transport. Now, within our prokaryotic cell, we have a region that contains our DNA, our genetic information, and this region is called the nucleoid, or the nucleoid region. Now, the nucleoid region is not the nucleus. The nucleoid region does not have a membrane like our nucleus does inside the eukaryotic cell. So usually inside a prokaryotic cell, we basically have a single double stranded circular DNA that is shown in brown. It basically contains our genes that code for the proteins that exist and function within our prokaryotic cell.