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MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is a carboxyl-protected amino acid.


A) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is a carboxyl-protected amino acid. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
B) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is a carboxyl-protected amino acid. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is a carboxyl-protected amino acid. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
E) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is a carboxyl-protected amino acid. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G) BOC group
H) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is a carboxyl-protected amino acid. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
I) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is a carboxyl-protected amino acid. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
J) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is a carboxyl-protected amino acid. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
K) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is a carboxyl-protected amino acid. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) Z group

N) E) and F)
O) A) and B)

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Provide the major organic product of the following reaction that is used in the chemical synthesis of peptides. Provide the major organic product of the following reaction that is used in the chemical synthesis of peptides.

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11ead7c8_9d1a_034b_84b0_539d3f8a18ed_TB7078_00

Which of the following amino acids is not chiral?


A) leucine
B) glycine
C) alanine
D) proline

E) A) and B)
F) A) and C)

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Provide the structure of Ser-Ala.

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The molecule shown below is an α-amino acid. The molecule shown below is an α-amino acid.

A) True
B) False

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To what structural feature does the term "quaternary structure" refer?


A) the sequence of amino acids in proteins
B) the overall folding pattern of proteins
C) the aggregation of polypeptides
D) the conformation of local regions of polypeptides

E) None of the above
F) B) and C)

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Which of the following amino acids is a secondary amine?


A) proline
B) glutamine
C) cysteine
D) aspargine

E) B) and D)
F) None of the above

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Which of the following amino acids has a non-polar side chain?


A) histidine
B) arginine
C) glutamine
D) valine

E) None of the above
F) C) and D)

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Structure _____ (shown below) will migrate toward the positive electrode in an electrophoresis experiment. CH3CHCO2−CH3CHCO2−CH3CHCO2H∣∣∣+NH3NH2+NH3IIIIII\begin{array}{ccc}\mathrm{CH}_{3} \mathrm{CHCO}_{2}^{-} &\mathrm{CH}_{3} \mathrm{CHCO}_{2}^{-} &\mathrm{CH}_{3} \mathrm{CHCO}_{2} \mathrm{H}\\|&|&|\\{ }^{+} \mathrm{NH}_{3} & \mathrm{NH}_{2} &{ }^{+} \mathrm{NH}_{3}\\I&II&III\end{array}

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Valylalanine and alanylvaline are constitutional isomers.

A) True
B) False

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To what structural feature does the term "primary structure" refer?


A) the sequence of amino acids in proteins
B) the overall folding pattern of proteins
C) the aggregation of polypeptides
D) the conformation of local regions of polypeptides

E) All of the above
F) C) and D)

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Which of the following tripeptides is not hydrolyzed by trypsin?


A) Glu-Arg-Ser
B) Arg-Glu-Thr
C) Glu-Ser-Arg
D) Lys-Ser-Arg

E) A) and B)
F) A) and C)

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C

Which of the following amino acids has an aromatic side chain?


A) tyrosine
B) glutamine
C) aspargine
D) valine

E) None of the above
F) All of the above

Correct Answer

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Which of the following amino acids contains two stereocenters?


A) isoleucine
B) proline
C) phenylalanine
D) glutamine

E) B) and C)
F) None of the above

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A

Which of the bonds in the following structure is cleaved by cyanogen bromide? Which of the bonds in the following structure is cleaved by cyanogen bromide? A) i B) ii C) iii D) iv


A) i
B) ii
C) iii
D) iv

E) A) and B)
F) A) and C)

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What is the isoelectric point of glutamic acid (pKa of α-CO2H, 2.10; pKa of β-CO2H, 4.07; pH of α-NH2, 9.47) ?


A) 3.08
B) 5.67
C) 6.16
D) 17.28

E) B) and C)
F) A) and C)

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Which of the following amino acids migrates to the negative electrode on paper electrophoresis at a pH of 7.0?


A) lysine
B) aspartic acid
C) asparagine
D) glutamic acid

E) A) and D)
F) A) and C)

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The combination of the two sidechains of the given compounds leads to the formation of a special bond. Identify the type of bond formed. ​ The combination of the two sidechains of the given compounds leads to the formation of a special bond. Identify the type of bond formed. ​ A) Disulfide bond B) Disulfite bond C) Hydrogen bond D) Vibrational bond


A) Disulfide bond
B) Disulfite bond
C) Hydrogen bond
D) Vibrational bond

E) All of the above
F) C) and D)

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MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is the product of an Edman degradation.


A) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is the product of an Edman degradation. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
B) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is the product of an Edman degradation. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu
D) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is the product of an Edman degradation. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
E) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is the product of an Edman degradation. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val
G) BOC group
H) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is the product of an Edman degradation. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
I) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is the product of an Edman degradation. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
J) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is the product of an Edman degradation. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
K) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes. -_____ is the product of an Edman degradation. A) B) C) Val−Phe−Leu−Met−Tyr−Pro−Gly−Trp−Cys−Glu D) E) F) Asp−Tyr−Ile−His−Pro−Phe−Arg−Val G) BOC group H) I) J) K) L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe M) Z group
L) Val−Lys−Phe−Gly−Arg−Met−Arg−Phe
M) Z group

N) C) and M)
O) A) and K)

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How does phenyl isothiocyanate, Ph−N=C=S, react with a peptide in the Edman degradation?


A) the sp carbon acts as an electrophile in a reaction with an amino group of the peptide
B) the sulfur acts as a nucleophile and adds to the carbon of the peptide bond
C) the nitrogen acts as a nucleophile and adds to the carbon of the peptide bond
D) the sp carbon acts as an electrophile in a reaction with a carboxylate of the peptide

E) All of the above
F) A) and C)

Correct Answer

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