JCECE Medical JCECE Medical Solved Paper-2013

  • question_answer
    The number ofdisulphide linkages present in insulin are

    A)  1        

    B)  2         

    C)  3        

    D)  4

    Correct Answer: C

    Solution :

     Insulin contains 51 amino acids arranged in two polypeptide chains containing 21 and 30 amino acid residues respectively. These two chains are joined together by twodisulphide cross links. In addition, the smaller polypeptide chain (21 amino acids) has also an internal disulphide linkage. Hence, option [c] is correct.


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