객관식
Which of the following structures is found in the cell wall of Gram-negative bacteria but not in Gram-positive bacteria?
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7. Prokaryotic Cell Structures & Functions
Introduction to Bacterial Cell Walls
객관식
Peptidoglycan is made up of:
A
N-acetylglucosamine
B
N-acetylmuramic acid & N-acetylglucosamine
C
N-acetylmuramic acid, N-acetylglucosamine, & amino acids
D
N-acetylmuramic acid, N-acetylglucosamine, & phospholipids
E
N-acetylmuramic acid, N-acetylglucosamine, & ribosomes
검증된 단계별 안내1
Understand that peptidoglycan is a crucial component of bacterial cell walls, providing structural strength.
Recognize that peptidoglycan is primarily composed of two alternating sugar derivatives: N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM).
Identify that these sugar derivatives are linked together in a chain, forming a glycan backbone.
Note that attached to the N-acetylmuramic acid are short peptide chains, which are composed of amino acids. These peptides cross-link the glycan chains, providing additional strength and rigidity.
Conclude that the correct composition of peptidoglycan includes N-acetylmuramic acid, N-acetylglucosamine, and amino acids, as these are the fundamental components involved in its structure.
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