- A Cholesterol
- B Proteins
- C Phospholipids
- D Cellulose
Correct answer: D. Cellulose
Explanation: Cellulose is found in plant cell walls, not in the cell membrane. Membranes contain phospholipids, proteins, and cholesterol.
Concept context
Cell theory, prokaryotic vs eukaryotic cells, organelles and their functions. Foundation of all biology.