Animal and plant cells are types of eukaryotic cells and bacteria are a type of prokaryotic cell. Eukaryotic cells contain their DNA in a nucleus and have membrane bound organelles such as the smooth and rough endoplasmic reticulum, golgi apparatus, and lysosome. However, prokaryotic cells contain their DNA in the form of circular DNA free in the cytoplasm and also have DNA in plasmids, which are circular. They also have no membrane bound organelles and have pili to help them stick to other bacteria cells and they can also have a slime capsule for protection. Another main difference is that all prokaryotic cells have a cell wall whereas not all eukaryotic cells do- only plant cells have a cell wall, not an animal cell.