Question 1

Which of the following amino acids would contain the highest concentration of zwitterions at pH 5.90?

Accepted Answer

A)   aspartic acid (pI 2.77) 
B)   alanine (pI 6.01) 
C)   lysine (pI 9.74) 
D)   glutamic acid (pI 3.22) 
E)   all of these contain approximately equal concentrations of zwitterionsF) A) and B)
G) A) and C)

Question 2

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.

Accepted Answer

The answer of Consider the following structure. Based on this...

Question 3

Match a term from the list below to each definition.
-Enzymes which catalyze the transfer of a phosphate group.

Accepted Answer

A)  Ligases
B)  Fibrous proteins
C)  Conjugated protein
D)  Hydrolases
E)  Simple proteinF) Globular proteinsG) KinasesH) B) and E)
I) A) and D)

Question 4

Consider the following structure. Based on this structure answer the following question(s). 
-Draw and name the structure of the product of the following reaction.

Accepted Answer

The answer of Consider the following structure. Based on this...

Question 5

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 pKS1U1B1a1S1U1B0 = 2.36 and pKS1U1B1a2S1U1B0 = 9.60.
-Refer to instructions. Draw the structure of the predominant form of leucine at pH = 10.00.

Accepted Answer

The answer of Refer to the data below to answer...

Question 6

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

Accepted Answer

A)  Ligases
B)  Fibrous proteins
C)  Conjugated protein
D)  Hydrolases
E)  Simple proteinF) Globular proteinsG) KinasesH) A) and C)
I) D) and E)

Question 7

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

Accepted Answer

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

Question 8

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 pKS1U1B1a1S1U1B0 = 2.36 and pKS1U1B1a2S1U1B0 = 9.60.
-Refer to instructions. What is the pI of leucine?

Accepted Answer

The pI is the isoele...

Question 9

Consider the following structure. Based on this structure answer the following question(s) . 
-Refer to instructions. How many other peptides could be formed from this same combination of amino acids?

Accepted Answer

A)   3
B)   6
C)   9
D)   12E) A) and C)
F) C) and D)

Question 10

Match a term from the list below to each definition.
-Proteins which coil into compact shapes.

Accepted Answer

A)  Ligases
B)  Fibrous proteins
C)  Conjugated protein
D)  Hydrolases
E)  Simple proteinF) Globular proteinsG) KinasesH) B) and G)
I) A) and B)

Question 11

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

Accepted Answer

A)   isoleucine
B)   valine
C)   tyrosine
D)   threonineE) C) and D)
F) A) and D)

Question 12

Which of the following tripeptides is not hydrolysed by chymotrypsin?

Accepted Answer

A)   Phe−Lys−Glu
B)   Lys−Tyr−Phe
C)   Gln−Ser−Phe
D)   Gln−Tyr−SerE) None of the above
F) B) and D)

Exam 19: Biomolecules: Amino Acids, Peptides, and Proteins

Consider the following structure. Based on this structure answer the following question(s) . -Refer to instructions. How many other peptides could be formed from this same combination of amino acids?

Correct Answer
verified

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 pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to instructions. Draw the structure of the predominant form of leucine at pH = 10.00.

Correct Answer
verified

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.

Correct Answer
verified

Match a term from the list below to each definition. -Enzymes which catalyze the transfer of a phosphate group.

Correct Answer
verified

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

Correct Answer
verified

Which of the following tripeptides is not hydrolysed by chymotrypsin?

Correct Answer
verified

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 pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to instructions. What is the pI of leucine?

Correct Answer
verified
The pI is the isoele...
View Answer

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

Correct Answer
verified

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

Correct Answer
verified

Which of the following amino acids would contain the highest concentration of zwitterions at pH 5.90?

Correct Answer
verified

Consider the following structure. Based on this structure answer the following question(s). -Draw and name the structure of the product of the following reaction.

Correct Answer
verified

Match a term from the list below to each definition. -Proteins which coil into compact shapes.

Correct Answer
verified

Exam 19: Biomolecules: Amino Acids, Peptides, and Proteins

Consider the following structure. Based on this structure answer the following question(s) . -Refer to instructions. How many other peptides could be formed from this same combination of amino acids?

Correct AnswerverifiedShow Answer

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 AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

Match a term from the list below to each definition. -Enzymes which catalyze the transfer of a phosphate group.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following tripeptides is not hydrolysed by chymotrypsin?

Correct AnswerverifiedShow Answer

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. What is the pI of leucine?

Correct AnswerverifiedThe pI is the isoele...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following amino acids would contain the highest concentration of zwitterions at pH 5.90?

Correct AnswerverifiedShow Answer

Consider the following structure. Based on this structure answer the following question(s). -Draw and name the structure of the product of the following reaction.

Correct AnswerverifiedShow Answer

Match a term from the list below to each definition. -Proteins which coil into compact shapes.

Correct AnswerverifiedShow Answer

Correct Answer
verified

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 pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to instructions. Draw the structure of the predominant form of leucine at pH = 10.00.

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

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 pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to instructions. What is the pI of leucine?

Correct Answer
verified
The pI is the isoele...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified