Question:
Polysaccharide present in bacterial cell wall is
Polysaccharide present in bacterial cell wall is
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Lysozyme, an enzyme found in tears and saliva, specifically hydrolyzes the \(\beta(1\rightarrow4)\) glycosidic bonds of peptidoglycan, highlighting its role as a key antibacterial defense mechanism.
Updated On: Jul 6, 2026
- Starch
- Cellulose
- Chitin
- Peptidoglycan
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Cell walls provide structural support and osmotic protection, with distinct taxonomic groups employing different chemical polymers for this purpose.
Step 2: Detailed Explanation:
Let us review the cell wall composition of different organisms:
1. Starch: A plant storage polysaccharide, not a structural cell wall component.
2. Cellulose: The primary structural beta-linked glucan polysaccharide of plant cell walls.
3. Chitin: A structural homopolysaccharide of N-acetylglucosamine found in fungal cell walls and arthropod exoskeletons.
4. Peptidoglycan (murein): A polymer consisting of alternating residues of \(\beta\)-(1\(\rightarrow\)4) linked N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) cross-linked by short amino acid peptide chains. This unique heteropolymer forms the rigid meshwork of bacterial cell walls.
Step 3: Final Answer:
The correct option is 4, which corresponds to Peptidoglycan.
Cell walls provide structural support and osmotic protection, with distinct taxonomic groups employing different chemical polymers for this purpose.
Step 2: Detailed Explanation:
Let us review the cell wall composition of different organisms:
1. Starch: A plant storage polysaccharide, not a structural cell wall component.
2. Cellulose: The primary structural beta-linked glucan polysaccharide of plant cell walls.
3. Chitin: A structural homopolysaccharide of N-acetylglucosamine found in fungal cell walls and arthropod exoskeletons.
4. Peptidoglycan (murein): A polymer consisting of alternating residues of \(\beta\)-(1\(\rightarrow\)4) linked N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) cross-linked by short amino acid peptide chains. This unique heteropolymer forms the rigid meshwork of bacterial cell walls.
Step 3: Final Answer:
The correct option is 4, which corresponds to Peptidoglycan.
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