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State whether the following is true or false.
The plasma membrane is symmetrical, with the same molecules on both faces.

  • A.False only at small scales
  • B.True
  • C.False
  • D.True only at large scales

Answer: C

The two leaflets differ markedly in their lipid composition, and carbohydrate chains are found only on the outer face. This asymmetry is established during synthesis and actively maintained by the cell using enzymes that flip lipids between the leaflets.

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