Final answer:
The plasma membrane consists of two layers of molecules called phospholipids.
Step-by-step explanation:
The plasma membrane, also known as the cell membrane, consists of a phospholipid bilayer. This bilayer is made up of two layers of phospholipid molecules. Each layer contains a hydrophilic (water-loving) head and two hydrophobic (water-repelling) tails. Therefore, the plasma membrane has two layers of molecules.
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