Prokaryotic cells are smaller and less complex than Eukaryotic cells. Bacterial cells are prokaryotic, whereas plant and animal cells are eukaryotic. In terms of structure, there are three key differences between prokaryotes and eukaryotes: 1. Outer layor of the cell - Prokaryotes have a cell membrane surrounded by a cell wall. Except for plants and fungi, eukaryotes only have a cell membrane. 2. Cell contents - Prokaryotes and eukaryotes both have cytoplasm containing ribosomes. Eukaryotes also contain membrane bound organelles, such as mitochondria, chloroplasts and the nucleus. 3. Storage of genetic material - Prokaryotic DNA is stored in the cytoplasm in a sinlgle strand. Additional DNA is found in rings called plasmids. Eukaryotic DNA, on the hand, is found in the nucleus.