Answer: Fluid mosaic of lipids and proteins.
- A Single phospholipid layer
- B Protein-lipid-protein trilayer
- C Fluid mosaic of lipids and proteins
- D Only protein layer
Correct answer: C. Fluid mosaic of lipids and proteins
Explanation: Robertson's unit membrane model proposed a protein-lipid-protein sandwich structure. Modern understanding is the fluid mosaic model.
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.