So what exactly is the structure of a prokaryotic organism? So, in this lecture, we're going to briefly discuss the general structure of the prokaryotic organism. We're going to examine some of the shapes of our prokaryotes, and then we'll briefly discuss the major differences between prokaryotes and eukaryotes. 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.