Question

for bacterial cells, the cell envelope layer that lies just outside the plasma membrane is called the ______.
options:

• glycocalyx
• cell wall
• outer membrane
• capsule

Explanation:

To solve this, we analyze each option:

• Glycocalyx: A layer outside the cell wall (in some bacteria), not directly outside the plasma membrane.
• Cell wall: In bacterial cells, the cell wall lies just outside the plasma membrane, providing structure and protection.
• Outer membrane: Present in gram - negative bacteria, outside the cell wall, not directly outside the plasma membrane.
• Capsule: A type of glycocalyx, a thick layer outside the cell wall (in some bacteria), not directly outside the plasma membrane.

Answer:

B. cell wall