The cell membrane is mainly made of the macromolecule lipids , specifically phospholipids that form a phospholipid bilayer.

Quick Scoop

  • The basic framework of the cell membrane is a phospholipid bilayer, a type of lipid macromolecule.
  • Each phospholipid has a water-loving (hydrophilic) head and water-fearing (hydrophobic) tails, so they arrange themselves into a double layer with tails inside and heads facing water.
  • Other macromolecules like proteins and carbohydrates are also present, but the main structural macromolecule that makes up the membrane is the phospholipid lipid layer.

In short, when someone asks “what macromolecule makes up the cell membrane?”, the go‑to answer is: phospholipids (a type of lipid).

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