The fluid mosaic model describes the plasma membrane as
Correct answer: B. a phospholipid bilayer with proteins embedded in and moving through it
- A. a rigid protein sheet with lipids attached
- B. a phospholipid bilayer with proteins embedded in and moving through it
- C. a single layer of phospholipids
- D. a continuous layer of cholesterol
Explanation
Singer and Nicolson described a bilayer of phospholipids in which proteins float like icebergs, free to move laterally. Fluid refers to that lateral movement and mosaic to the scattered pattern of proteins. Cholesterol is present between the phospholipids and modulates fluidity, but it does not form a layer of its own.
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About Animal and Plant Cell
Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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