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The similarities and differences between eukaryotic and prokaryotic cells Prokaryotic and Eukaryotic cells are the two main types of cell found in living organisms. They share many similarities and also many differences. These differences are key to how they function and which jobs they are suitable to perform. Prokaryotic cells are cells that contain a very primitive nucleus as pro- means before and karyon is a Greek word, meaning nucleus. Prokaryotic cells are found in organisms such as bacteria, most commonly eubacteria and archae bacteria. Eukaryotic cells are therefore are found in all other living organisms, the name implying that there is a proper nucleus present. As there is no nucleus present in prokaryotic cells the DNA helix is a single coiled chromosome that is unsupported and so can float freely around the cell, howeve