Procaryotic & Eucaryotic Cells Information of organells in the cells were studied after an vention of electron microscope which amplified image of objective up to 500,000 time Cells Eucaryotic cells: eu true, cary nucleus cells have a "true" nucleus that contains genetic information or DNA inside a nuclear membrane Procaryotic cells: pro before, cary nucleus Their DNA is not enclosed within a nuclear membrane. The nuclear region is referred to as a nucleoid uina