Question

the fluid mosaic model states that
b. water is repelled from both surfaces of the cell membrane
c. there is a liquid portion between the parts of the cell membrane that facilitates the passage of
molecules through the membrane.
a. the cell membrane is a phospholipid bilayer with embedded proteins and that it is in constant
motion
d. all of the above

Explanation:

The fluid mosaic model describes the cell membrane as a phospholipid bilayer with embedded proteins. The phospholipids have hydrophilic heads (attracted to water) and hydrophobic tails (repelled by water). The membrane is in constant motion (fluid), and there are various proteins embedded which can facilitate the passage of molecules. Option A correctly describes the basic structure (phospholipid bilayer with embedded proteins) and the fluid nature (constant motion). Option B is related as the hydrophobic tails repel water. Option C is also in line as the fluid nature (liquid - like in terms of movement) can facilitate molecule passage. So all options A, B, and C contribute to the fluid mosaic model description.

Answer:

D. All of the above