Question

Gram $(-)$ve bacteria possess peptidoglycan and an extra layer of

• A. Protein
• B. Lipoprotein
• C. Lipopolysaccharide
• D. Lipid

Answer 1

The correct option is C Lipopolysaccharide

Both Gram negative and Gram positive bacteria have a peptidoglycan layer in the cell wall. Peptidoglycan is also called as mucopeptide. It is a polymer that is made up of sugars and amino acids. Gram positive bacteria have thick layer of peptidoglycan. However, Gram negative bacteria have thin layer of peptidoglycan. Apart from this, Gram negative bacteria have outer wall made up of lipopolysaccharide.

Thus, the correct answer is 'Lipopolysaccharide.'