Question 1

Name the following compound.

Accepted Answer

A) tyrosine 
B) lysine 
C) arginine 
D) histidine 
E) phenylalanine 
A) tyrosine 
B) lysine 
C) arginine 
D) histidine 
E) phenylalanine

Question 2

The number of most common naturally occurring amino acids is

Accepted Answer

A) 10. 
B) 20. 
C) 30. 
D) 40. 
E) >40. 
A) 10. 
B) 20. 
C) 30. 
D) 40. 
E) >40.

Question 3

Draw the form of L-tryptophan which is present at biological pH.

Accepted Answer

The answer of Draw the form of L-tryptophan which is...

Question 4

Which of the following structures can polypeptides have?

Accepted Answer

A) primary structure 
B) secondary structure 
C) tertiary structure 
D) quaternary structure 
E) all of the above 
A) primary structure 
B) secondary structure 
C) tertiary structure 
D) quaternary structure 
E) all of the above

Question 5

Carboxypeptidase is an enzyme used in the determination of the primary structure of a protein.Specifically,which of the following does it identify?

Accepted Answer

A) the number and kind of amino acids in the protein 
B) the disulfide bridges in the protein 
C) C-terminal amino acid of the protein 
D) N-terminal amino acid of the protein 
E) the number of peptide bonds in the protein 
A) the number and kind of amino acids in the protein 
B) the disulfide bridges in the protein 
C) C-terminal amino acid of the protein 
D) N-terminal amino acid of the protein 
E) the number of peptide bonds in the protein

Question 6

What is the single-letter abbreviation for glutamine?

Accepted Answer

A) E 
B) W 
C) R 
D) Y 
E) Q 
A) E 
B) W 
C) R 
D) Y 
E) Q

Question 7

Which of the following amino acids is not an aromatic compound?

Accepted Answer

A) phenylalanine 
B) threonine 
C) histidine 
D) tryptophan 
E) tyrosine 
A) phenylalanine 
B) threonine 
C) histidine 
D) tryptophan 
E) tyrosine

Question 8

Provide the major organic product(s)of the reaction below.

Accepted Answer

The answer of Provide the major organic product(s)of the reaction...

Question 9

Provide the structure of the tripeptide val-gly-ser at pH 12.

Accepted Answer

The answer of Provide the structure of the tripeptide val-gly-ser...

Question 10

Draw a line where cleavage occurs with elastase.

Accepted Answer

The answer of Draw a line where cleavage occurs with...

Question 11

Draw the dipeptide Val-Tyr at pH 7.0.

Accepted Answer

The answer of Draw the dipeptide Val-Tyr at pH 7.0....

Question 12

The sequence of amino acids and location of the disulfide bridges can be obtained from the

Accepted Answer

A) primary structure. 
B) secondary structure. 
C) tertiary structure. 
D) ternary structure. 
E) quaternary structure. 
A) primary structure. 
B) secondary structure. 
C) tertiary structure. 
D) ternary structure. 
E) quaternary structure.

Question 13

What amino acid can be obtained by the reductive amination of γ-ketoglutaric acid,HO2CCH2CH2COCO2H?

Accepted Answer

A) glycine 
B) serine 
C) lysine 
D) aspartic acid 
E) glutamic acid 
A) glycine 
B) serine 
C) lysine 
D) aspartic acid 
E) glutamic acid

Question 14

α-Helix of proteins is stabilized by

Accepted Answer

A) disulfide bridges. 
B) hydrogen bonds. 
C) electrostatic interactions. 
D) hydrophobic interactioms. 
E) none of the above. 
A) disulfide bridges. 
B) hydrogen bonds. 
C) electrostatic interactions. 
D) hydrophobic interactioms. 
E) none of the above.

Question 15

Provide the structure of Ala-Ser-Gly at biological pH.

Accepted Answer

The answer of Provide the structure of Ala-Ser-Gly at biological...

Question 16

The quaternary structure of proteins is concerned with which of the following?

Accepted Answer

A) sequence of amino acids in the peptide chain 
B) description of the way the peptide chains are arranged with respect to each other 
C) location of the disulfide bridges in the peptide chain 
D) conformation of the protein backbone 
E) three-dimensional arrangement of all atoms in the protein 
A) sequence of amino acids in the peptide chain 
B) description of the way the peptide chains are arranged with respect to each other 
C) location of the disulfide bridges in the peptide chain 
D) conformation of the protein backbone 
E) three-dimensional arrangement of all atoms in the protein

Question 17

Which of the following are capable of denaturing proteins?

Accepted Answer

A) organic solvents 
B) detergents 
C) extreme pH 
D) heat 
E) all of the above 
A) organic solvents 
B) detergents 
C) extreme pH 
D) heat 
E) all of the above

Question 18

Which of the following amino acids has an aromatic R group?

Accepted Answer

A) serine 
B) cysteine 
C) asparagine 
D) tyrosine 
E) leucine 
A) serine 
B) cysteine 
C) asparagine 
D) tyrosine 
E) leucine

Question 19

Which of the following amino acids has an aliphatic R group?

Accepted Answer

A) serine 
B) cysteine 
C) asparagine 
D) tyrosine 
E) leucine 
A) serine 
B) cysteine 
C) asparagine 
D) tyrosine 
E) leucine

Question 20

In a globular protein,would the side chain of aspartic acid most probably be oriented toward the interior of the protein or outward toward the aqueous surroundings? Explain.

Accepted Answer

The aspartic acid side chain i

Exam 21: Amino Acids,peptides,and Proteins

Name the following compound.

The number of most common naturally occurring amino acids is

Draw the form of L-tryptophan which is present at biological pH.

Which of the following structures can polypeptides have?

Carboxypeptidase is an enzyme used in the determination of the primary structure of a protein.Specifically,which of the following does it identify?

What is the single-letter abbreviation for glutamine?

Which of the following amino acids is not an aromatic compound?

Provide the major organic product(s)of the reaction below.

Provide the structure of the tripeptide val-gly-ser at pH 12.

Draw a line where cleavage occurs with elastase.

Draw the dipeptide Val-Tyr at pH 7.0.

The sequence of amino acids and location of the disulfide bridges can be obtained from the

What amino acid can be obtained by the reductive amination of γ-ketoglutaric acid,HO2CCH2CH2COCO2H?

α-Helix of proteins is stabilized by

Provide the structure of Ala-Ser-Gly at biological pH.

The quaternary structure of proteins is concerned with which of the following?

Which of the following are capable of denaturing proteins?

Which of the following amino acids has an aromatic R group?

Which of the following amino acids has an aliphatic R group?

In a globular protein,would the side chain of aspartic acid most probably be oriented toward the interior of the protein or outward toward the aqueous surroundings? Explain.

Remembering General Chemistry: Electronic Structure and Bonding

Acids and Bases: Central to Understanding Organic Chemistry

An Introduction to Organic Compounds: Nomenclature, physical Properties, and Structure

Isomers: the Arrangement of Atoms in Space

Alkenes: Structure,nomenclature,and an Introduction to Reactivity - Thermodynamics and Kinetics

The Reactions of Alkenes - the Stereochemistry of Addition Reactions

The Reactions of Alkynes - Introduction to Multistep Synthesis

Delocalized Electrons: Their Effect on Stability, pka, and the Products of a Reaction - Aromaticity and Electronic Effects: an Introduction to the Reactions of Benzene

Substitution and Elimination Reactions of Alkyl Halides

Reactions of Alcohols, ethers, epoxides, amines and Sulfur-Containing Compounds

Organometallic Compounds

Radicals

Mass Spectrometry,infrared Spectroscopy,and Uvvis Spectroscopy

Nmr Spectroscopy

Reactions of Carboxylic Acids and Carboxylic Acid Derivatives

Reactions of Aldehydes and Ketones

Reactions at the Α-Carbon

Reactions of Benzene and Substituted Benzenes

More About Amines - Reactions of Heterocylic Compounds

The Organic Chemistry of Carbohydrates

Catalysis in Organic Reactions and in Enzymatic Reactions

The Organic Chemistry of the Coenzymes, compounds Derived From Vitamins

The Organic Chemistry of the Metabolic Pathways

The Organic Chemistry of Lipids

The Chemistry of the Nucleic Acids

Synthetic Polymers

Pericyclic Reactions

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What amino acid can be obtained by the reductive amination of γ-ketoglutaric acid,HO₂CCH₂CH₂COCO₂H?