Textbook Question
Bacteria cell walls tend to contain:
a. Peptidoglycan.
b. Lipid bilayers.
c. Cholesterol.
d. Pseudomurein.
e. Flagellin.
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7. Prokaryotic Cell Structures & Functions
Introduction to Bacterial Cell Walls
Multiple Choice
The peptidoglycan molecule is responsible for the:
A
Entry and exit of molecules into and from the cell.
B
Flexibility of the cytoplasmic membrane.
C
Motility of the bacterial cell.
D
Genetic characteristics of the bacterial cell.
E
Semi-rigid cell wall structure of prokaryotes.
Verified step by step guidance1
Understand the role of peptidoglycan: Peptidoglycan is a crucial component of the bacterial cell wall, providing structural support and shape to the cell.
Identify the function of peptidoglycan: It forms a mesh-like layer outside the plasma membrane, contributing to the semi-rigid structure of the cell wall in prokaryotes.
Differentiate peptidoglycan from other cellular components: Unlike the cytoplasmic membrane, which is flexible, peptidoglycan provides rigidity and protection against osmotic pressure.
Consider the options given: Entry and exit of molecules, flexibility, motility, and genetic characteristics are functions associated with other cellular components, not peptidoglycan.
Conclude the correct function: The primary role of peptidoglycan is to maintain the semi-rigid cell wall structure of prokaryotes, distinguishing it from the other options provided.
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