Researchers studying membrane dynamics use fluorescent markers to track protein movement within the plasma membrane. They observe that some proteins move freely, while others remain localized.
Which of the following statements best describes the fluid mosaic model of the cell membrane?
Phospholipids and proteins move laterally within the bilayer.
Membrane proteins move between the two phospholipid layers of the bilayer.
Phospholipids are covalently bonded to each other for stability.
Cholesterol prevents any movement within the membrane.
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