Answer: Cellulose.
- A Protein
- B Chitin
- C Cellulose
- D Peptidoglycan
Correct answer: C. Cellulose
Explanation: Plant cell walls are made of cellulose (polysaccharide). Fungal cell walls contain chitin; bacterial walls have peptidoglycan.
Animal cell structure with major organelles labeled. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
Cell theory, prokaryotic vs eukaryotic cells, organelles and their functions. Foundation of all biology.