Question 1

Which of these natural amino acids contains an amide function?

Accepted Answer

A)  Asparagine 
B)  Methionine 
C)  Cysteine 
D)  Glutamine 
E)  Two of these 
A)  Asparagine 
B)  Methionine 
C)  Cysteine 
D)  Glutamine 
E)  Two of these

Question 2

Why is dicyclohexylcarbodiimide (DCC)used in peptide synthesis?

Accepted Answer

A)  DCC "protects" the amino group of the intended N-terminal amino acid. 
B)  DCC activates the carboxyl group of one amino acid so that this amino acid reacts more readily with a second amino acid. 
C)  DCC cleaves the blocking groups from the final peptide. 
D)  DCC is the resin used in the automated synthesis of peptides. 
E)  DCC removes the peptide from the resin at the conclusion of the synthesis. 
A)  DCC "protects" the amino group of the intended N-terminal amino acid. 
B)  DCC activates the carboxyl group of one amino acid so that this amino acid reacts more readily with a second amino acid. 
C)  DCC cleaves the blocking groups from the final peptide. 
D)  DCC is the resin used in the automated synthesis of peptides. 
E)  DCC removes the peptide from the resin at the conclusion of the synthesis.

Question 3

The hormone that regulates glucose metabolism is called ______________.Deficiency of this hormone is the major cause of __________.

Accepted Answer

The answer of The hormone that regulates glucose metabolism is...

Question 4

The primary structure of a protein refers to its:

Accepted Answer

A)  sequence of amino acid residues. 
B)  disulfide bonds. 
C)  helical structure. 
D)  hydrogen bonding. 
E)  All of these 
A)  sequence of amino acid residues. 
B)  disulfide bonds. 
C)  helical structure. 
D)  hydrogen bonding. 
E)  All of these

Question 5

The occurrence of this amino acid in a polypeptide chain disrupts an α-helix:

Accepted Answer

A)  Proline 
B)  Alanine 
C)  Methionine 
D)  Histidine 
E)  Tyrosine 
A)  Proline 
B)  Alanine 
C)  Methionine 
D)  Histidine 
E)  Tyrosine

Question 6

What is the pI of the following amino acid?

Accepted Answer

A)  1.6 
B)  3.2 
C)  5.5 
D)  6.2 
E)  7.0 
A)  1.6 
B)  3.2 
C)  5.5 
D)  6.2 
E)  7.0

Question 7

What are the name and the structure of the products A and B?

Accepted Answer

The answer of What are the name and the structure...

Question 8

What is the final product formed when potassium phthalimide is subjected to the following reaction sequence? Give structural details of all significant intermediates,including stereochemistry,as applicable.

Accepted Answer

The answer of What is the final product formed when...

Question 9

Draw the structures of ValAla and AlaVal as zwitterions.

Accepted Answer

The answer of Draw the structures of ValAla and AlaVal...

Question 10

What is the pI of the following amino acid?

Accepted Answer

A)  1.5 
B)  6.3 
C)  5.6 
D)  9.8 
E)  6.8 
A)  1.5 
B)  6.3 
C)  5.6 
D)  9.8 
E)  6.8

Question 11

What product would be obtained upon treating alanine with the following reagent ?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 12

Which of these is used to convert a protein into smaller,more manageable fragments for subsequent structural studies?

Accepted Answer

A)  Insulin 
B)  Aminopeptidase 
C)  Carboxypeptidase 
D)  Trypsin which is produced in the HYPERLINK "http://en.wikipedia.org/wiki/Pancreas" \o "Pancreas" pancreas as the inactive HYPERLINK "http://en.wikipedia.org/wiki/Proenzyme" \o "Proenzyme" proenzyme HYPERLINK "http://en.wikipedia.org/wiki/Trypsinogen" \o "Trypsinogen" trypsinogen. 
E)  2,4-Dinitrofluorobenzene 
A)  Insulin 
B)  Aminopeptidase 
C)  Carboxypeptidase 
D)  Trypsin which is produced in the HYPERLINK "http://en.wikipedia.org/wiki/Pancreas" \o "Pancreas" pancreas as the inactive HYPERLINK "http://en.wikipedia.org/wiki/Proenzyme" \o "Proenzyme" proenzyme HYPERLINK "http://en.wikipedia.org/wiki/Trypsinogen" \o "Trypsinogen" trypsinogen. 
E)  2,4-Dinitrofluorobenzene

Question 13

Which of these amino acids is described as an "essential" amino acid?

Accepted Answer

A)  Threonine 
B)  Glycine 
C)  Tyrosine 
D)  Serine 
E)  All of these are "essential" amino acids 
A)  Threonine 
B)  Glycine 
C)  Tyrosine 
D)  Serine 
E)  All of these are "essential" amino acids

Question 14

Which amino acid is achiral?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Which of these natural amino acids contains an amide function?

Why is dicyclohexylcarbodiimide (DCC)used in peptide synthesis?

The hormone that regulates glucose metabolism is called ____.Deficiency of this hormone is the major cause of .

The primary structure of a protein refers to its:

The occurrence of this amino acid in a polypeptide chain disrupts an α-helix:

What is the pI of the following amino acid?

What are the name and the structure of the products A and B?

What is the final product formed when potassium phthalimide is subjected to the following reaction sequence? Give structural details of all significant intermediates,including stereochemistry,as applicable.

Draw the structures of ValAla and AlaVal as zwitterions.

What is the pI of the following amino acid?

What product would be obtained upon treating alanine with the following reagent ?

Which of these is used to convert a protein into smaller,more manageable fragments for subsequent structural studies?

Which of these amino acids is described as an "essential" amino acid?

Which amino acid is achiral?

Carbon Compounds and Chemical Bonds

Representative Carbon Compounds: Functional Groups, Intermolecular Forces, and Infrared Ir Spectroscopy

An Introduction to Organic Reactions: Acids and Bases

Alkanes: Nomenclature, Conformational Analysis, and an Introduction to Synthesis

Stereochemistry: Chiral Molecules

Ionic Reactions - Nucleophilic Substitution and Elimination Reactions of Alkyl Halides

Alkenes and Alkynes I: Properties and Synthesis, Elimination Reactions of Alkyl Halides

Alkenes and Alkynes Ii: Addition Reactions

Nuclear Magnetic Resonance and Mass Spectrometry: Tools for Structure Determination

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds Oxidation-Reduction and Organometallic Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones I Nucleophilic Addition to the Carbonyl Group

Aldehydes and Ketones Ii Aldol Reactions

Carboxylic Acids and Their Derivatives Nucleophilic Addition - Elimination at the Acyl Carbon

Synthesis and Reactions of Beta-Dicarbonyl Compounds: More Chemistry of Enolate Ions

Amines

Phenols and Aryl Halides: Nucleophilic Aromatic Substitution

Carbohydrates

Lipids

Nucleic Acids and Protein Synthesis

Filters

Exam 24: Amino Acids and Proteins

Which of these natural amino acids contains an amide function?

Why is dicyclohexylcarbodiimide (DCC)used in peptide synthesis?

The hormone that regulates glucose metabolism is called ______________.Deficiency of this hormone is the major cause of __________.

The primary structure of a protein refers to its:

The occurrence of this amino acid in a polypeptide chain disrupts an α-helix:

What is the pI of the following amino acid?

What are the name and the structure of the products A and B?

What is the final product formed when potassium phthalimide is subjected to the following reaction sequence? Give structural details of all significant intermediates,including stereochemistry,as applicable.

Draw the structures of ValAla and AlaVal as zwitterions.

What is the pI of the following amino acid?

What product would be obtained upon treating alanine with the following reagent ?

Which of these is used to convert a protein into smaller,more manageable fragments for subsequent structural studies?

Which of these amino acids is described as an "essential" amino acid?

Which amino acid is achiral?

Carbon Compounds and Chemical Bonds

Representative Carbon Compounds: Functional Groups, Intermolecular Forces, and Infrared Ir Spectroscopy

An Introduction to Organic Reactions: Acids and Bases

Alkanes: Nomenclature, Conformational Analysis, and an Introduction to Synthesis

Stereochemistry: Chiral Molecules

Ionic Reactions - Nucleophilic Substitution and Elimination Reactions of Alkyl Halides

Alkenes and Alkynes I: Properties and Synthesis, Elimination Reactions of Alkyl Halides

Alkenes and Alkynes Ii: Addition Reactions

Nuclear Magnetic Resonance and Mass Spectrometry: Tools for Structure Determination

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds Oxidation-Reduction and Organometallic Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones I Nucleophilic Addition to the Carbonyl Group

Aldehydes and Ketones Ii Aldol Reactions

Carboxylic Acids and Their Derivatives Nucleophilic Addition - Elimination at the Acyl Carbon

Synthesis and Reactions of Beta-Dicarbonyl Compounds: More Chemistry of Enolate Ions

Amines

Phenols and Aryl Halides: Nucleophilic Aromatic Substitution

Carbohydrates

Lipids

Nucleic Acids and Protein Synthesis

Filters

The hormone that regulates glucose metabolism is called ____.Deficiency of this hormone is the major cause of .