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The cell membrane is composed of the lipid bilayer. In addition to lipids most membranes contain proteins and carbohydrates. ________________________________________________________________. YOUR finger nails and hair are made out of Keratin. its a protein (so is whale baleen and animal horns)
Confidence votes 104. plasma membrane of animal cells is made up of phospholipid bilayer.It contains phospholipid molecules,globular proteins,cholesterol,carbohydrates etc.model of the plasma membrane is known as the fluid mosaic model.