Biology / Bio 0321 · Atom · ~20 seconds
The Fluid Mosaic Model
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The fluid mosaic model describes the plasma membrane as a shifting mosaic of phospholipids, cholesterol, proteins, and carbohydrates, none fixed in place.
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Singer and Nicolson proposed the model in 1972, replacing an earlier view of a rigid, sandwich-like membrane.
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A fluid membrane is not a loose one — it reseals after a fine needle punctures it.