Multiple Choice
Which of the following bacterial cell types is most sensitive to radiation damage?
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7. Prokaryotic Cell Structures & Functions
Introduction to Bacterial Cell Walls
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The bulk of the Gram-positive cell wall is a homogeneous sheath primarily composed of which of the following?
A
Lipopolysaccharide
B
Phospholipid
C
Peptidoglycan
D
Teichoic acid
Verified step by step guidance1
Understand the structure of bacterial cell walls, focusing on the differences between Gram-positive and Gram-negative bacteria.
Recall that Gram-positive bacteria have a thick, multilayered cell wall, which is primarily composed of a specific polymer that provides rigidity and shape.
Identify the main component of the Gram-positive cell wall, which is a mesh-like polymer made of sugars and amino acids, known as peptidoglycan.
Recognize that lipopolysaccharide is a major component of the outer membrane of Gram-negative bacteria, not Gram-positive bacteria.
Note that teichoic acids are present in Gram-positive cell walls but are not the bulk material; they are embedded within the peptidoglycan layers and serve other functions.
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