A) Borsche's test
B) Molisch's test
C) Ninhydrin test
D) Biuret test
Correct Answer: D
Solution :
For the identification of peptide linkage the test performed is Biuret test. \[N{{H}_{2}}CON{{H}_{2}}\xrightarrow{\text{Heat}}N{{H}_{3}}+NH=C=O\] \[\underset{\text{Peptide}\,\text{bond}}{\mathop{NH=C=O\,+}}\,\,N{{H}_{2}}CON{{H}_{2}}\xrightarrow{{}}\] \[\underset{\text{Biuret}}{\mathop{{{H}_{2}}NCONHCON{{H}_{2}}}}\,\]
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