Question

Gram negative bacteria possess

• A. Lipopolysaccharide and thick layer of murein
• B. Lipopolysaccharide and thin layer of murein
• C. No lipopolysaccharide and thick murein
• D. No lipopolysaccharide and thin murein

Answer 1

The correct option is B Lipopolysaccharide and thin layer of murein

The Gram-negative cell wall is characterized by presence of outer membrane, a thinner peptidoglycan layer and extensive periplasmic space surrounding the peptidoglycan. The uppermost layer of the outer membrane has lipopolysaccharide. The peptidoglycan layer is composed of a macromolecule peptidoglycan/murein which is a repeating framework of long glycan chains having alternate N-acetyl glucosamine and N-acetyl muramic acid.

Thus, the correct answer is option B.