Biomolecules Question 113
Question: Proteins when heated with conc. $ HNO_3 $ give a yellow colour. This is
[CPMT 1989]
Options:
A) Oxidising test
B) Xanthoprotic test
C) Hoppe’s test
D) Acid-base test
Show Answer
Answer:
Correct Answer: B
Solution:
Protein + conc. $ HNO_3 $
$\to$ Yellow colour [This test is given by a protein which consists of a-amino acids containing a benzene ring such as tyrosine, phenylalanine etc. The yellow colour is due to nitration of benzene ring.]
BETA
