Which molecule is the chief component of most prokaryotic cell walls?

1. Most prokaryotes carry a cell wall outside the plasma membrane. 2. The chief component of that prokaryotic wall is peptidoglycan. 3. Cellulose is the major organic molecule of the plant cell wall instead, so it belongs to eukaryotes. 4. A phospholipid sheet describes the membrane, not the wall. 5. The prokaryotic wall is built chiefly of peptidoglycan. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.2 Prokaryotic Cells_