According to the fluid mosaic model of the cell membrane,
a. there are fats floating in the protein layer.
b. carbohydrates function as membrane channels.
c. nonpolar ends of phospholipids are exposed to water inside and outside the cell.
d. protein molecules that perform important cellular functions float in a lipid bilayer.
e. there is a double protein layer in the plasma membrane.

According to the fluid mosaic model of the cell membrane, protein molecules that perform important cellular functions float in a lipid bilayer.

In conclusion, according to the fluid mosaic model, proteins are essential components of the cell membrane that float in the lipid bilayer.  

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The answer is C. Nonpolar ends of phospholipids are exposed to watee inside and outside the cell

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the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.