A high level of peptidoglycan (polysaccharide) in the cell wall of bacteria will be stain gram positive (purple). Cells with a lower concentration of peptidoglycan in the cell walls are gram negative (pink). Gram negative cells have an outer membrane that is toxic to mammalian physiology and helps protect cells from antibiotics. How does having a lesser concentration of the polysaccharide in the cell walls (gram negative) give it more resistance to antibiotics? Is it because a thinner cell wall will give less protection against mutagens so the cell is more likely to survive the antibiotics?