question_answer

The peptide that gives positive ceric ammonium nitrate and carbylamine tests is : [JEE Main 9-4-2019 Afternoon]

A) Lys-Asp                      

B) Ser-Lys

C) Gln-Asp                      

D) Asp-Gln

Correct Answer: B

Solution :

Serine             Lysine Lysine has \[-N{{H}_{2}}\] group hence gives \[\oplus \text{ve}\] carbyl amine test and serine has -OH group hence gives \[\oplus \text{ve}\]serric ammonium nitrate test