Question

Correct sequence of layers of bacterial cell envelope is:

• A. Cell membrane, glycocalyx, cell wall
• B. Glycocalyx, cell wall, cell membrane
• C. Glycocalyx, cell membrane, cell wall
• D. Cell wall, glycocalyx, cell membrane

Answer 1

The correct option is B Glycocalyx, cell wall, cell membrane

Bacterial cell envelope consists of three components - glycocalyx, cell wall and cell membrane.

Glycocalyx is the outermost mucilage layer of the cell envelope
Cell Wall is the rigid solid covering made up of peptidoglycan which provides shape and structural support to the cell. Cell wall lies between plasma membrane and glycocalyx.
Plasma/Cell Membrane is a flexible and selectively permeable covering around the cytoplasm that forms the innermost component of cell envelope.
Thus, option b is the correct answer.