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AP Biology277 views·Updated Aug 13, 2026Components of the Plasma Membrane
Practice identifying the molecular structure of phospholipids, proteins, cholesterol, and carbohydrates within the fluid mosaic model.
The fluid mosaic model describes the plasma membrane as a dynamic structure. Which of the following best explains how the molecular structure of phospholipids contributes to the fluidity of the membrane?
- The fluid mosaic model describes the plasma membrane as a dynamic structure. Which of the following best explains how the molecular structure of phospholipids contributes to the fluidity of the membrane? — Kinks in unsaturated fatty acid tails prevent tight packing of the phospholipid molecules.
- A researcher treats a cell with a chemical that removes carbohydrates from the external surface of the plasma membrane. Which of the following functions would most likely be impaired? — The ability of the cell to be recognized by other cells, such as immune cells.
- Cholesterol is a vital component of mammalian cell membranes. How does cholesterol regulate membrane fluidity as the environmental temperature decreases? — It prevents the phospholipids from packing too tightly together and solidifying.
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