Multiple Choice
Which of the following best describes the gram-negative cell wall?
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7. Prokaryotic Cell Structures & Functions
Gram-Negative Cell Walls
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Which component forms the bottom layer of a Gram-negative bacterial cell wall?
A
Lipopolysaccharide
B
Peptidoglycan
C
Teichoic acid
D
Phospholipid bilayer
Verified step by step guidance1
Understand the structure of a Gram-negative bacterial cell wall, which consists of multiple layers including an outer membrane, a thin peptidoglycan layer, and an inner cytoplasmic membrane.
Identify the outermost layer as the outer membrane, which contains lipopolysaccharides (LPS) on its outer leaflet.
Recognize that beneath the outer membrane lies the thin peptidoglycan layer, which provides structural support but is not the bottom layer.
Recall that the bottom layer of the cell wall in Gram-negative bacteria is the inner cytoplasmic membrane, which is a phospholipid bilayer.
Conclude that the phospholipid bilayer forms the bottom layer of the Gram-negative bacterial cell wall, underlying the peptidoglycan and outer membrane.
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