<prompt> Organism lacking cell wall:BacillusActinomycetesChlamydiaeMycoplasma  <response>: Ans: d Mycoplasma Ref: Ananthanarayanan, 7th ed, p. 395Mycoplasma are a group of bacteria that are devoid of cell walls and so highly pleomorphic with no size and shape.The cells are bounded by a soft trilaminar unit membrane containing sterols.Cell wall: Between capsule cytoplasmic membrane-CELL WALL COMPONENTS Gram positiveGram negativePeptidoglycanPeptidoglycanTeichoic acidLipoproteinPolysaccharideLipopolysaccharide Peptidoglycan mucopeptide or murienFormed ofN acetyl glucosamine and N acetyl muramic acid.In Gram positive around 40 sheets while inGram negative only 1-2 are present.It provides tensile strength.LipopolysacchrideHas endotoxic activity; released only when cells are lysed.LipoproteinMost abundant part of Gram negative cell wallTeichoic acidMajor antigenic determinantPolymer of ribitol or glycerol 