According to the widely accepted "Fluid mosaic model", cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect?

  • A
    Proteins in cell membranes can travel within the lipid bilayer.
  • B
    Proteins can also undergo flip-flop movements in the lipid bilayer.
  • C
    Proteins can remain confined within certain domains of the membrane.
  • D
    Many proteins remain completely embedded within the lipid bilayer.

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