Question

The main difference in Gram $(+)$ve and Gram $(-)$ve bacteria resides in their

• A. Cell wall
• B. Cell membrane
• C. Cytoplasm
• D. Flagella

Answer 1

The correct option is A Cell wall

All bacteria posses cell wall. However, the bacteria are classified as Gram positive bacteria and Gram negative bacteria on the basis of their cell wall. Cell wall of Gram positive bacteria consist of multiple layer of peptidoglycan. Cell wall of Gram negative bacteria is made up thin layer of peptidoglycan. In addition, they have one more outer layer of lipopolysaccharide (LPS).

Thus, the correct answer is 'Cell wall.'