Which three jobs does the prokaryotic cell wall perform?

1. The prokaryotic cell wall sits outside the plasma membrane as an extra layer. 2. It acts as an extra layer of protection for the cell. 3. It helps the cell maintain its shape and it prevents dehydration. 4. Attachment, conjugation and locomotion are handled by the capsule, the pili and the flagella respectively, not by the wall. 5. The wall gives protection, shape and resistance to drying. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.2 Prokaryotic Cells_