QUES 1. A vasodilating compound is produced by the decarboxylation of the amino acid:
Histidine
Arginine
Aspartic acid
Glutamine
QUES 2. Biuret reaction is specific for
–CSNH2 group
–(NH)NH2 group
–CONH-linkages
All of these
QUES 3. Sakaguchi’s reaction is specific for
Tyrosine
Arginine
Proline
Cysteine
QUES 4. Million-Nasse’s reaction is specific for the amino acid:
Tryptophan
Arginine
Phenylalanine
Tyrosine
QUES 5. Ninhydrin with evolution of CO2 forms a blue complex with
α -Amino acids
Peptide bond
Histamine
Serotonin
QUES 6. The most of the ultraviolet absorption of proteins above 240 nm is due to their content of
Aspartate
Glutamate
Tryptophan
Alanine
QUES 7. Which of the following is a dipeptide?
Glutathione
Glucagon
β -Lipoprotein
Anserine
QUES 8. Which of the following is a tripeptide?
Oxytocin
Glutathione
Anserine
Kallidin
QUES 9. A peptide which acts as potent smooth muscle hypotensive agent is
Glutathione
Gramicidin-s
Tryocidine
Bradykinin
QUES 10. A tripeptide functioning as an important reducing agent in the tissues is
Bradykinin
Kallidin
Tyrocidin
Glutathione