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NEET Sample Paper NEET Sample Test Paper-83

  • question_answer
    In which of the following case, the forms of amino acid and pH is not correctly matched?

    A)   

    B)  

    C)  

    D)    

    Correct Answer: A

    Solution :

    Isoelectric point for neutral amino acids ranges from pH 5.5 to 6.3. Acidic amino acids have isoelectric point around 3 while basic amino acids have ranges from pH = 7.6 to 10.8. At isoelectric point amino acid exist as Zwitter ion. At low pH it exists as cation and at high pH it is exists as anion. Hence, alanine \[\left( pH = 3 \right)\] will exists as cation.


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