Filters
Question type
Study Flashcards

Which of the following tripeptides is not hydrolyzed by chymotrypsin?


A) Phe-Lys-Glu
B) Lys-Tyr-Phe
C) Gln-Ser-Phe
D) Gln-Tyr-Ser

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

Correct Answer

verifed

verified

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


A) isoleucine
B) valine
C) phenylalanine
D) threonine

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

Correct Answer

verifed

verified

Which of the following amino acids has a basic side chain?


A) lysine
B) serine
C) leucine
D) tyrosine

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

Correct Answer

verifed

verified

Disulfide bonds form between the thiol side chains of cysteine. What is the best term to describe the reaction of two thiols to give a disulfide bond?

Correct Answer

verifed

verified

Consider the following octapeptide. Ala-Val-Trp-Lys-Phe-Gly-Arg-Met The fragments that would be obtained by a trypsin hydrolysis are Ala-Val-Trp-Lys and Phe-Gly-Arg and Met.

A) True
B) False

Correct Answer

verifed

verified

Which of the following natural amino acids is an R-isomer?


A) cysteine
B) serine
C) valine
D) phenylalanine

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

Correct Answer

verifed

verified

Provide the structure of Ser-Phe-Asp.

Correct Answer

verifed

verified

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 polypeptide which gives four fragments on treatment with chymotrypsin.


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 polypeptide which gives four fragments on treatment with chymotrypsin. 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 polypeptide which gives four fragments on treatment with chymotrypsin. 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 polypeptide which gives four fragments on treatment with chymotrypsin. 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 polypeptide which gives four fragments on treatment with chymotrypsin. 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 polypeptide which gives four fragments on treatment with chymotrypsin. 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 polypeptide which gives four fragments on treatment with chymotrypsin. 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 polypeptide which gives four fragments on treatment with chymotrypsin. 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 polypeptide which gives four fragments on treatment with chymotrypsin. 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) G) and K)
O) B) and D)

Correct Answer

verifed

verified

What are the R/S designations of the two stereocenters of isoleucine? What are the R/S designations of the two stereocenters of isoleucine? A) 2R,3R B) 2R,3S C) 2S,3R D) 2S,3S


A) 2R,3R
B) 2R,3S
C) 2S,3R
D) 2S,3S

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

Correct Answer

verifed

verified

What is the approximate value of the pKa of the α-CO2H of amino acids?


A) 2
B) 5
C) 9
D) 12

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

Correct Answer

verifed

verified

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 an amino acid in its zwitterionic form.


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 an amino acid in its zwitterionic form. 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 an amino acid in its zwitterionic form. 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 an amino acid in its zwitterionic form. 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 an amino acid in its zwitterionic form. 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 an amino acid in its zwitterionic form. 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 an amino acid in its zwitterionic form. 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 an amino acid in its zwitterionic form. 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 an amino acid in its zwitterionic form. 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) B) and H)
O) E) and H)

Correct Answer

verifed

verified

What fragments are produced when porcine dynorphin, a peptide that contains 17 amino acid residues (shown below), is cleaved with trypsin? Tyr−Gly−Gly−Phe−Leu−Arg−Arg−Ile−Arg−Pro−Lys−Leu−Lys−Trp−Asp−Asn−Gln

Correct Answer

verifed

verified

Tyr−Gly−Gly−Phe−Leu−...

View Answer

Edman degradation of the peptide saralasin shows that it has a sarcosine residue at the N-terminus. Sarcosine is Edman degradation of the peptide saralasin shows that it has a sarcosine residue at the N-terminus. Sarcosine is Partial hydrolysis of saralasin with dilute hydrochloric acid gives the following fragments: His−Pro−Ala Val−Tyr−Val Arg−Val−Tyr Sar−Arg−Val Tyr−Val−His What is the structure of saralasin? Partial hydrolysis of saralasin with dilute hydrochloric acid gives the following fragments: His−Pro−Ala Val−Tyr−Val Arg−Val−Tyr Sar−Arg−Val Tyr−Val−His What is the structure of saralasin?

Correct Answer

verifed

verified

Sar−Arg−Va...

View Answer

In Cys-Ile-Ser-Asp-Gly-His-Gly-Gly, the three-letter abbreviation for the N-terminal amino acid is ________.

Correct Answer

verifed

verified

Provide the structure of dicylcohexylcarbodiimide, a common reagent that is used to couple two amino acid residues by formation of a peptide bond, and the structure N,N'-dicyclohexylurea, the byproduct of this reaction.

Correct Answer

verifed

verified

What fragments are produced when porcine dynorphin, a peptide that contains 17 amino acid residues (shown below), is cleaved with chymotropsin? Tyr−Gly−Gly−Phe−Leu−Arg−Arg−Ile−Arg−Pro−Lys−Leu−Lys−Trp−Asp−Asn−Gln

Correct Answer

verifed

verified

Tyr
Gly−Gly−Phe
Leu−...

View Answer

Which of the following is not a polypeptide?


A) L-HIV-1 protease
B) hemoglobin
C) myoglobin
D) glycogen

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

Correct Answer

verifed

verified

Structure _____ (shown below) will remain at the origin 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}

Correct Answer

verifed

verified

What is the major organic product of the following reaction? What is the major organic product of the following reaction? A) 1 B) 2 C) 3 D) 4


A) 1
B) 2
C) 3
D) 4

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

Correct Answer

verifed

verified

The number of different combinations that are possible for a tripeptide containing one of each of the following amino acids: Phe, Val, Asp is ______.

Correct Answer

verifed

verified

Showing 41 - 60 of 77

Related Exams

Exam 1

Covalent Bonding and Shapes of Molecules

118 Questions

Exam 2

Alkanes and Cycloalkanes

101 Questions

Exam 3

Stereoisomerism and Chirality

95 Questions

Exam 4

Acids and Bases

94 Questions

Exam 5

Alkenes: Bonding, Nomenclature, and Properties

88 Questions

Exam 6

Reactions of Alkenes

97 Questions

Exam 7

Alkynes

100 Questions

Exam 8

Haloalkanes, Halogenation, and Radical Reactions

75 Questions

Exam 9

Nucleophilic Substitution and Beta-Elimination

104 Questions

Exam 10

Alcohols

102 Questions

Exam 11

Ethers, Epoxides, and Sulfides

102 Questions

Exam 12

Infrared Spectroscopy

74 Questions

Exam 13

Nuclear Magnetic Resonance Spectroscopy

99 Questions

Exam 14

Mass Spectrometry

75 Questions

Exam 15

An Introduction to Organometallic Compounds

73 Questions

Exam 16

Aldehydes and Ketones

122 Questions

Exam 17

Carboxylic Acids

76 Questions

Exam 18

Functional Derivatives of Carboxylic Acids

117 Questions

Exam 19

Enolate Anions and Enamines

96 Questions

Exam 20

Dienes, Conjugated Systems, and Pericyclic Reactions

75 Questions

Exam 21

Benzene and the Concept of Aromaticity

77 Questions

Exam 22

Reactions of Benzene and Its Derivatives

109 Questions

Exam 23

Amines

92 Questions

Exam 24

Catalytic Carbon-Carbon Bond Formation

84 Questions

Exam 25

Carbohydrates

69 Questions

Exam 26

Lipids

65 Questions

Exam 28

Nucleic Acids

58 Questions

Exam 29

Organic Polymer Chemistry

68 Questions

Show Answer