What is the primary structural material of the cell wall in true fungi?
Answer and explanation
Correct answer: A. Chitin
- Step 1: Fungal cells are eukaryotic and possess rigid external cell walls.
- Step 2: The primary structural polysaccharide of the fungal wall is chitin, an unbranched polymer of -linked N-acetylglucosamine.
- Step 3: This differs fundamentally from plant cell walls (cellulose) and bacterial walls (peptidoglycan).
Answer
Chitin.
Why not the others: Peptidoglycan is the wall polymer of eubacteria; Cellulose is the structural glucan polymer of green plants and algae; Silica forms the rigid frustule of diatoms.
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