<prompt> Bacitracin acts on:Cell wallCell membraneNucleic acidRibosome  <response>: Ans. A Cell wallRef: Katzung 10e p741; KDT 8e p741Bacitracin acts by inhibiting the synthesis of cell wall.Other polypeptide antibiotics like polymyxin B, colistin and tyrothricin act by affecting membranes. 