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NEET Biology NEET PYQ-Cell The Unit Of Life

  • question_answer
    According to 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? [AIPMT (S) 2005]

    A) Proteins in cell membranes can travel within the lipid bilayer

    B) Proteins can remain confined within certain domains of the membrane

    C) Proteins can also undergo flip-flop movements in the lipid bilayer

    D) Many proteins remain completely embedded within the lipid bilayer

    Correct Answer: C

    Solution :

    [C] Flip-Flop or transmembrane movement is due to migration of lipid molecules from one lipid monolayer to other mono layer of lipid bilayer.


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