Difference between Gram positive bacterial cell wall and Gram negative bacterial cell wall Features Gram Positive Bacterial Cell wall Gram Negative Bacterial Cell wall Gram staining Appears in Violet colour Appears in Pink colour Thickness 15 – 18 nm 7 – 8 nm Peptidoglycan Thick (Multilayered) Thin (Single layered) Teichoic acids Present Absent Periplasmic space Absent Present Outer membrane Absent Present Lipopolysaccharides Low High Lipid & Lipoproteins Low (Only in Acid fast bacteria have lipid linked to Peptidoglycan) High (because of the presence of Outer membrane) Porins Absent Present Cell wall disruption by Lysozymes High...