So, let's begin with the structure. Now, all prokaryotic organisms are enclosed in a cell wall. And the cell wall basically protects our cell, the organism, from the outside environment. 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.