The pili are hair-like projections that allow a bacteria cell to stick to surfaces. The pili also allow the transfer of DNA from one bacteria cell to another.
Bacteria cells differ to those of plants and animals as the cells lack a nucleus and other membrane-bound organelles. The cells do have ribosomes, small organelles, found in the cytoplasm. A bacteria cell has a basal body that allows it to rotate, and most have a layer on the outside of the cell wall. The cells contain DNA located in the jellylike cytoplasm. It is there the genetic material and the ribosomes are located.