Which statement best describes the bacterial cell wall?
1. It is a rigid structure.
2. It is semipermeable.
3. It is composed of lipids.
4. It is single-layered.
Correct Answer: 1
Rationale 1: The bacterial cell wall is rigid.
Rationale 2: The bacterial cell wall is nonpermeable.
Rationale 3: The bacterial cell wall is composed of carbohydrates and protein.
Rationale 4: The bacterial cell wall is multilayered.
Global Rationale: The cell wall is a structure that sets people apart from the bacterial world. Humans do not have them, but all bacteria do. The osmotic pressure is so high within a bacterial cell that the cell would rupture without the containment of this rigid structure. The cell wall also serves as a barrier to substances that try to enter the cell, including antibiotics. Simply, it protects the bacterial cell from a hostile environment.
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