AMU Medical AMU Solved Paper-2007

  • question_answer
    Proteins when heated with cone. \[HN{{O}_{3}}\], give a yellow colour. This is

    A)  oxidising test

    B)  xanthoprotic test

    C)  Hoppes test

    D)  acid-base test

    Correct Answer: B

    Solution :

                     Xanthoprotic test Protein + cone. \[HN{{O}_{3}}\xrightarrow{{}}\] yellow colour This test is given by the protein which consists of a-amino acids containing a benzene ring such as tyrosine, phenyl alanine etc. This yellow colour is due to nitration of benzene ring.


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