VMMC VMMC Medical Solved Paper-2009

  • question_answer
    The thickness of unit membrane is

    A) \[20\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    B) \[35\,\overset{\text{o}}{\mathop{\text{A}}}\,\]                              

    C)  \[55\,\overset{\text{o}}{\mathop{\text{A}}}\,\]                             

    D)         \[75\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

    Correct Answer: D

    Solution :

    The unit membrane, described by J David Robertson, was considered as 75 \[\overset{0}{\mathop{A}}\,\] thick trilaminar (3 layered membrane). According to his unit membrane or trilaminar model, unit membrane consists if 35 A thick bimolecular phospholipid layer between two protein layers, each with 20 \[\overset{0}{\mathop{A}}\,\] thickness.


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