1) The reagent used in the determination of the N-terminal amino acid residue of
ID: 912081 • Letter: 1
Question
1) The reagent used in the determination of the N-terminal amino acid residue of a peptide is?
A. carboxypeptidase.
B. phenyl isothiocyanate.
C. dicyclohexylcarbodiimide.
D. ethyl chloroformate.
E. peroxyformic acid.
2) Amides are:
A. the most reactive acid derivative.
B. the most acidic acid derivative.
C. the most stable acid derivative.
D. the least stable acid derivative.
E. the most reactive acid derivative and the least stable acid derivative.
3) Which of the following are capable of denaturing proteins?
A. organic solvents
B. detergents
C. extreme pH
D. heat
E. all of these
4.) A protein bonded to a fat would be classified as a:
A. simple protein.
B. glycoprotein.
C. lipoprotein.
D. metalloprotein.
E. nucleoprotein.
5.) The side chain for histidine is classified as a _____ side chain.
A. basic
B. neutral
C. acidic
D. nonpolar
E. polar
Explanation / Answer
1) The reagent used in the determination of the N-terminal amino acid residue of a peptide is:phenyl isothiocyanate.
2) Amides are:the least stable acid derivative.
3) Which of the following are capable of denaturing proteins?
A. organic solvents
B. detergents
C. extreme pH
D. heat
E. all of these (Right answer)
4) A protein bonded to a fat would be classified as a lipoprotein.
5.) The side chain for histidine is classified as a Basic side chain.
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