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Instructions: Refer to the data below to answer the following question. Instructions: Refer to the data below to answer the following question. -Refer to instructions. The most basic amino acid is __________. -Refer to instructions. The most basic amino acid is __________.

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Instructions: Consider the following structure. Based on this structure answer the following question(s). Instructions: Consider the following structure. Based on this structure answer the following question(s). -Refer to instructions. Circle the peptide bonds. -Refer to instructions. Circle the peptide bonds.

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Instructions: Match a structure from the list below to each of the following terms. -The product of an Edman degradation.


A) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
B) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
C) Val-Phe-Leu-Met-Tyr-Pro-Gly-Trp-Cys-Glu
D) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
E) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
F) Asp-Tyr-Ile-His-Pro-Phe-Arg-Val
G) apoenzyme
H) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
I) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
J) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
K) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe
M) vitamins

N) F) and I)
O) A) and D)

Correct Answer

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Refer to the data below to answer the following questions: The octapeptide saralasin is a specific antagonist of angiotensin II. A derivative of saralasin is used therapeutically as an antihypertensive. Amino acid analysis of saralasin show the presence of the following amino acids: Ala, Arg, His, Pro, Sar, Tyr, Val2 -Refer to instructions. Partial hydrolysis of saralasin with dilute hydrochloric acid yields the following fragments: Tyr-Val-His Sar-Arg-Val His-Pro-Ala Val-Tyr-Val Arg-Val-Tyr What is the structure of saralasin?

Correct Answer

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blured image
The complete sequen...

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Refer to the data below to answer the following questions: The octapeptide saralasin is a specific antagonist of angiotensin II. A derivative of saralasin is used therapeutically as an antihypertensive. Amino acid analysis of saralasin show the presence of the following amino acids: Ala, Arg, His, Pro, Sar, Tyr, Val2 -Refer to instructions. Sar is the mnemonic for sarcosine, N-methyl aminoethanoic acid. Draw the structure of sarcosine.

Correct Answer

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Which of the following reagents can be used to cleave a tert-butoxycarbonyl (Boc) protecting group from a peptide?


A) H2/Pd
B) CF3CO2H
C) Na2CO3, H2O
D) LiAlH4

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

Correct Answer

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Instructions: Refer to the data below to answer the following question(s). Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid. It has pKa1 = 2.36 and pKa2 = 9.60. -Refer to instructions. Draw the structure of the predominant form of leucine at pH = 10.00.

Correct Answer

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What are the R/S designations of the two stereocenters of L-threonine? What are the R/S designations of the two stereocenters of L-threonine? 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 C)
F) B) and D)

Correct Answer

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Match a term from the list below to each definition. -Proteins which are tough and insoluble in water.


A) Ligases
B) Fibrous proteins
C) Conjugated protein
D) Hydrolases
E) Simple protein
F) Globular proteins
G) Kinases

H) None of the above
I) A) and B)

Correct Answer

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

Correct Answer

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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) B) and C)
F) C) and D)

Correct Answer

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Instructions: Refer to the data below to answer the following question(s). Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid. It has pKa1 = 2.36 and pKa2 = 9.60. -Refer to instructions. How many possible stereoisomers of leucine are there?

Correct Answer

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Since leucine has on...

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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) B) and C)

Correct Answer

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Instructions: Match a structure from the list below to each of the following terms. -An amino acid in its zwitterionic form.


A) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
B) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
C) Val-Phe-Leu-Met-Tyr-Pro-Gly-Trp-Cys-Glu
D) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
E) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
F) Asp-Tyr-Ile-His-Pro-Phe-Arg-Val
G) apoenzyme
H) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
I) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
J) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
K) Instructions: Match a structure from the list below to each of the following terms. -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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe
M) vitamins

N) A) and M)
O) F) and K)

Correct Answer

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Instructions: Consider the following structure. Based on this structure answer the following question(s). Instructions: Consider the following structure. Based on this structure answer the following question(s). -Refer to instructions. Name the peptide using both the three-letter and one-letter codes. -Refer to instructions. Name the peptide using both the three-letter and one-letter codes.

Correct Answer

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Show the steps involved in a synthesis of F-G-I using the Merrifield procedure.

Correct Answer

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Instructions: Refer to the data below to answer the following question(s). Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid. It has pKa1 = 2.36 and pKa2 = 9.60. -Refer to instructions. Draw a Fischer projection of L-leucine and label the chirality center(s) as R or S.

Correct Answer

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Instructions: Refer to the data below to answer the following question(s). Porcine dynorphin is a neuropeptide having 17 amino acid residues. Its structure is shown below. Tyr-Gly-Gly-Phe-Leu-Arg-Arg-Ile-Arg-Pro-Lys-Leu-Lys-Trp-Asp-Asn-Gln -Refer to instructions. What fragments would result if dynorphin were cleaved by chymotropsin?

Correct Answer

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Chymotropsin catalyzes the hydrolysis of...

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An enzyme classified as a ligase would be associated with a reaction than involves the:


A) introduction of a double bond.
B) loss of water.
C) loss of carbon dioxide.
D) transfer of an amino group.
E) hydrolysis of an ester.

F) A) and B)
G) C) and D)

Correct Answer

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Instructions: Match a structure from the list below to each of the following terms. -Source from which many coenzymes are derived.


A) Instructions: Match a structure from the list below to each of the following terms. -Source from which many coenzymes are derived. 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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
B) Instructions: Match a structure from the list below to each of the following terms. -Source from which many coenzymes are derived. 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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
C) Val-Phe-Leu-Met-Tyr-Pro-Gly-Trp-Cys-Glu
D) Instructions: Match a structure from the list below to each of the following terms. -Source from which many coenzymes are derived. 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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
E) Instructions: Match a structure from the list below to each of the following terms. -Source from which many coenzymes are derived. 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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
F) Asp-Tyr-Ile-His-Pro-Phe-Arg-Val
G) apoenzyme
H) Instructions: Match a structure from the list below to each of the following terms. -Source from which many coenzymes are derived. 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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
I) Instructions: Match a structure from the list below to each of the following terms. -Source from which many coenzymes are derived. 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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
J) Instructions: Match a structure from the list below to each of the following terms. -Source from which many coenzymes are derived. 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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
K) Instructions: Match a structure from the list below to each of the following terms. -Source from which many coenzymes are derived. 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) apoenzyme H) I) J) K) L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe M) vitamins
L) Val-Lys-Phe-Gly-Arg-Met-Arg-Phe
M) vitamins

N) A) and B)
O) C) and D)

Correct Answer

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