<prompt> Bacterial cell wall is composed of all except?Muramic acidTeichoic acidGlucosamineMucopeptide  <response>: Ans. is b i.e., Teichoic acid . Chemically,cell wall is composed of mucopeptide peptidoglycan or murein scaffolding formed by N acetyl glucosamine and N acetyl muramic acid molecules alternating in chains, which are cross linked by peptide chains. Note- option b is also paially correct as teichoic acid is present in the cell wall of gram positive bacteria but not in gram negative bacteria. 