Proteins when heated with conc. $HN{O_3}$ give a yellow colour. This is
A
Oxidising test
B
Xanthoprotic test
C
Hoppe's test
D
Acid-base test
Medium
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B
Xanthoprotic test
b (b) Protein + conc. $HN{O_3}$ $\to$ Yellow colour
[This test is given by a protein which consists of $\alpha$- amino acids containing a benzene ring such as tyrosine, phenylalanine etc. The yellow colour is due to nitration of benzene ring.]
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A short peptide on complete hydrolysis produces $3$ moles of glycine $(G)$, two moles of leucine $(L)$ and two moles of valine $(V)$ per mole of peptide. The number of peptide linkages in it are $..............$.