JEE Main & Advanced Sample Paper JEE Main Sample Paper-28

  • question_answer
     , histidine has\[p{{K}_{{{a}_{1}}}}=1.8\], \[p{{K}_{{{a}_{2}}}}=9.2\] and \[p{{K}_{{{a}_{3}}}}=6.0\]. The isoelectric point, \[(PI)\] of histidine is likely to be

    A)  In between \[1.8\] and \[6.0\]

    B)  In between \[6.0\] and \[9.2\]

    C)  \[<1.8\]                                              

    D)  \[>9.2\]

    Correct Answer: B

    Solution :

    \[P.I=\frac{p{{K}_{{{a}_{2}}}}+P{{K}_{{{a}_{3}}}}}{2}=7\]


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