Question:
The bacterial cell wall contains peptidoglycans, which are polymers of N-Acetyl Glucosamine and __________.
The bacterial cell wall contains peptidoglycans, which are polymers of N-Acetyl Glucosamine and __________.
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Think of the two repeating amino sugars that make up murein.
Updated On: Jul 4, 2026
- N-Ethyl Gluconic acid
- N-Methyl Gluconic acid
- N-Acetyl Muramic acid
- N-Peptidyl Gluconic acid
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The Correct Option is C
Solution and Explanation
Step 1: Peptidoglycan (murein), the main structural polymer of the bacterial cell wall, is built from two alternating amino sugars joined by beta 1,4 glycosidic bonds.
Step 2: These two sugars are N-Acetyl Glucosamine (NAG) and N-Acetyl Muramic acid (NAM). Short peptide chains attached to NAM cross-link adjacent strands, giving the wall its rigidity.
Step 3: None of the other options, N-Ethyl Gluconic acid, N-Methyl Gluconic acid or N-Peptidyl Gluconic acid, are real components of the bacterial wall, so option (C) N-Acetyl Muramic acid is correct.
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