Now, all prokaryotes have cell walls, but not all eukaryotes have cell walls. For example, plants do have cell walls, but we humans do not have any cell walls. Animals do not have cell walls around our cell. Now, what are the different types of ribosomes that exist between prokaryotes and eukaryotes? So, earlier I mentioned that although prokaryotic organisms do in fact have ribosomes that synthesize proteins, the type of units that the ribosomes consist of are different in prokaryotic organisms and eukaryotic organisms. So within prokaryotes, we have the subunits, while in the eukaryotic organisms, we have the subunits that compose our ribosomes.