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Solution


Q.

A dipeptide, “x” on complete hydrolysis gives “y” and “z”. “y” on treatment with aq. HNO2 produces lactic acid. On the other hand “z” on heating gives the following cyclic molecule.

Based on the information given, the dipeptide X is:                     [2025]
1 valine–glycine  
2 alanine–glycine  
3 valine–leucine  
4 alanine–alanine  

Ans.

(2)