Question 1

Match a term from the list below to each definition.

-Enzymes which catalyze the bonding together of two substrates.

Accepted Answer

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

Question 2

During peptide synthesis, the carboxylic acid group may be protected as the methyl ester. Aqueous base hydrolysis is utilized to remove the ester protecting group.   Write the complete stepwise mechanism for the hydrolysis of the methyl ester of BOC-Val-Gly-OCH3, above. Show all intermediate structures and all electron flow with arrows.

Accepted Answer

Question 3

To what structural feature does the term "quaternary 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 polypeptides 
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

Question 4

Define isoelectric point.

Accepted Answer

The isoelectric point is the p

Question 5

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

Question 6

Which of the following tripeptides is not hydrolysed by trypsin?

Accepted Answer

A)  Glu-Arg-Ser 
B)  Arg-Glu-Thr 
C)  GluF-Ser-Arg 
D)  Lys-Ser-Arg 
A)  Glu-Arg-Ser 
B)  Arg-Glu-Thr 
C)  GluF-Ser-Arg 
D)  Lys-Ser-Arg

Question 7

Instructions: 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)  12 
A)  3 
B)  6 
C)  9 
D)  12

Question 8

To what structural feature does the term "tertiary 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 polypeptides 
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

Question 9

Write the equation for the reaction, using methanol (CH3OH), that would render the carboxyl group of alanine unreactive.

Accepted Answer

Question 10

Instructions: Refer to the data below to answer the following question.
 
-Refer to inatructions. The most acidic amino acid is ____.

Accepted Answer

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

Match a term from the list below to each definition. -Enzymes which catalyze the bonding together of two substrates.

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

Define isoelectric point.

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

Which of the following tripeptides is not hydrolysed by trypsin?

Instructions: 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?

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

Write the equation for the reaction, using methanol (CH₃OH), that would render the carboxyl group of alanine unreactive.

Instructions: Refer to the data below to answer the following question. -Refer to inatructions. The most acidic amino acid is ____.

Structure and Bonding:acids and Bases

Alkanes: the Nature of Organic Compounds

Alkenes and Alkynes: the Nature of Organic Reactions

Reactions of Alkenes and Alkynes

Aromatic Compounds

Sterechemistry at Tetrahedral Centers

Organohalides: Nucleophilic Substitutions and Eliminations

Alcohols, Phenols, Ethers, and Their Sulfur Analogs

Aldehydes and Ketones: Nucleophilic Addition Reactions

Carboxylic Acids and Derivatives: Nucleophilic Acyl Substitution Reactions

Carbonyl Alpha-Substitution Reactions and Condensation Reactions

Amines

Structure Determination

Biomolecules: Carbohydrates

Biomolecules: Lipids and Nucleic Acids

The Organic Chemistry of Metabolic Pathways

Filters

Exam 15: Biomolecules: Amino Acids, Peptides, and Proteins

Match a term from the list below to each definition. -Enzymes which catalyze the bonding together of two substrates.

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

Define isoelectric point.

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

Which of the following tripeptides is not hydrolysed by trypsin?

Instructions: 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?

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

Write the equation for the reaction, using methanol (CH3OH), that would render the carboxyl group of alanine unreactive.

Instructions: Refer to the data below to answer the following question. -Refer to inatructions. The most acidic amino acid is ____.

Structure and Bonding:acids and Bases

Alkanes: the Nature of Organic Compounds

Alkenes and Alkynes: the Nature of Organic Reactions

Reactions of Alkenes and Alkynes

Aromatic Compounds

Sterechemistry at Tetrahedral Centers

Organohalides: Nucleophilic Substitutions and Eliminations

Alcohols, Phenols, Ethers, and Their Sulfur Analogs

Aldehydes and Ketones: Nucleophilic Addition Reactions

Carboxylic Acids and Derivatives: Nucleophilic Acyl Substitution Reactions

Carbonyl Alpha-Substitution Reactions and Condensation Reactions

Amines

Structure Determination

Biomolecules: Carbohydrates

Biomolecules: Lipids and Nucleic Acids

The Organic Chemistry of Metabolic Pathways

Filters

Write the equation for the reaction, using methanol (CH₃OH), that would render the carboxyl group of alanine unreactive.