Question

Peptidoglycan forms many layers in the wall of

• A. Gram $(+)$ bacteria
• B. Gram $(-)$ bacteria
• C. Gram neutral bacteria
• D. All the above

Answer 1

Answer: (A)

Gram $(+)$ bacteria

On the basis of composition of cell wall, the bacteria are classified into two groups, namely Gram positive and Gram negative bacteria. Cell wall of all bacteria is made up of peptidoglycan. The gram positive bacteria contains many layers of peptidoglycan. However, Gram negative bacteria contains single layer of peptidoglycan. Apart from this, it also contains an outer layer of lipopolysaccharide (LPS).

Thus, the correct answer is 'Gram (+) bacteria.'