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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)
Introduction: The membrane of a cell is only two molecules thick, but it is of incredible importance in. terms of the evolution of life on the planet as we know it. The plasma membrane is composed of two layers. of phospholipids, special molecules that. are kind of confused, with a hydrophilic. head group (the phosphate end) and a. hydrophobic tail end (made of fatty acid. chains). These molecules organize into a. bilayer, with the head groups facing.