Question

Lipopolysaccharide is an important cell wall component of the

• A. Gram-positive
• B. Gram-negative
• C. Acid fast bacteria
• D. Mycoplasmas

Answer 1

The correct option is B Gram-negative

Gram-negative bacteria have a thin peptidoglycan layer(This is much thicker in Gram-positive bacteria) and have outer membrane containing lipopolysaccharides(much lesser in gram-positive). Mycobacterium contains large amounts of lipid substances within their cell walls called mycolic acids. These acids resist staining by ordinary methods such as a Gram-stain.