Question

1. which part of a bacteria is a rigid layer that gives the cell shape and protects the cell from pressure differences?

cell membrane
cell wall
capsule
nucleoid

Explanation:

• The cell membrane is a semi - permeable layer that controls the movement of substances in and out of the cell.
• The cell wall is a rigid layer. In bacteria, it is made of peptidoglycan. It gives the cell its shape and protects the cell from osmotic lysis (bursting due to pressure differences).
• The capsule is a slimy layer outside the cell wall that helps bacteria in adhesion and protection from phagocytes.
• The nucleoid is the region in a prokaryotic cell (like bacteria) that contains the genetic material (DNA).

Answer:

cell wall