Question

Which are Characteristic of Gram negative bacteria?

Answer

Thickness of cell wall is 75-120Ǻ. Cell wall is wavy and in contact with cell membrane only at a few places. Cell wall is two-layered, outer wall is of lipopolysaccharide and interwall of peptidoglycan with 20-30% lipid content and 10-20% murein. Mesosome less prominent pill, common. Mostly bacilli, capsulated, flagellation common. Teichoic acid absent, more resistant to antibiotics. e.g. E. coli, Rhizobium, Xanthomonas, etc.