1) The fluid mosaic model of the membrane proposed that membranes
A) consist of a phospholipid bilayer composed of a variety of fatty acids.
B) consist of protein molecules embedded in a fluid bilayer of phospholipids.
C) consist of a single layer of phospholipids and proteins.
D) consist of a ...
D) enable the membrane to stay fluid more easily when the temperature drops.
✓ -:- D
6) According to the fluid mosaic model of cell membranes, which of the following is a true
statement about membrane phospholipids?
A) They can move laterally along the plane of the membrane.
B) They frequently flip-flop from one side of the membrane to the other.
C) They occur in an uninterrupted bilayer, with membrane proteins restricted to the surface
of the membrane.
D) They are free to depart from the membrane and dissolve in the surrounding solution.
✓ -:- A
7) Which of the following is one of the ways that the membranes of winter wheat are able
to remain fluid when it is extremely cold?
A) by increasing the average length of the fatty acid tails in membrane
B) by decreasing the percentage of cholesterol molecules in the membrane
C) by decreasing the number of hydrophobic proteins in the membrane
D) by increasing the percentage of unsaturated phospholipids in the membrane
3|Page | Grade A+| 2024/2025
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