Prokaryotic cells

• The cell wall is a rigid outer covering made out of peptidoglycan
• The capsule is a protective slimy layer which helps to retain moisture and adhere to surfaces
• Plasmid is a circular piece of DNA
• Flagellum is a tail like structure which rotates to move the cell
• Pili is hair - like structures which attach to other bacterial cells
• Ribosomes is the site of protein production