prokaryotic cells

• what is a prokaryotic cell?

  single-celled organisms
• what is an example of a prokaryotic cell?

  bacteria
• what organelles do prokaryotic cells sometimes contain and what do they do?

  flagellum-motioncapsule-protectioninfolding of cell surface membrane-allow photosynthesis or carry out nitrogen fixationplasmid-small circle of DNApili-for attachment to other cells or surfaces, involved in sexual reproduction
• what organelles are always present in prokaryotic cells and what is their function?

  cell wall-containing peptidoglycancell surface membranecytoplasmcircular dnaribosomes (70s)
• what is the average diameter of a prokaryotic cell?

  0.1 micrometre