What Does Nucleus Mean?
All eukaryotic cells contain a nucleus, which is a dense organelle situated centrally to the cell and encased in a double membrane, which contains the genetic information of the organism it is found within. The nucleus is often called the brain or control center of a eukaryotic cell. The nucleus contains both DNA and RNA and responsible for growth and reproduction within eukaryotic cell. If a cell is labeled as being prokaryotic, this means it does not have a nucleus and that its genetic information is stored in a piece of DNA attached to the cell membrane and contacting the cytoplasm.