- A chitin
- B cellulose
- C peptidoglycan
- D pure protein
Correct answer: A. chitin
Explanation: Fungal cell walls contain chitin, unlike the cellulose walls of plants.
Concept context
Whittaker's five kingdom system covering Monera, Protista, Fungi, plus viruses, viroids, and lichens. A foundational NEET chapter on how living organisms are grouped.