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Question

Gram negative bacteria possess
  1. Lipopolysaccharide and thick layer of murein
  2. Lipopolysaccharide and thin layer of murein
  3. No lipopolysaccharide and thick murein
  4. No lipopolysaccharide and thin murein

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
Solution
Verified by Toppr

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.

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