Question 1

Which amino acid is not chiral?

Accepted Answer

A) alanine 
B) arginine 
C) cysteine 
D) glycine 
E) phenylalanine 
A) alanine 
B) arginine 
C) cysteine 
D) glycine 
E) phenylalanine

Question 2

This question has four parts:
a.For the amino acid shown above in zwitterion form,circle the carboxyl group,underline the amine group,label the alpha carbon,and draw a box around the R group.
b.Write the name and abbreviation of your amino acid.
c.Classify the amino acid as polar,non-polar,acidic,or basic.Explain the basis for your classification.
d.Draw the structure of the amino acid at a pH well below its isoelectric point and well above its isoelectric point.

Accepted Answer

Any amino acid may be drawn in.This ques

Question 3

Detergents would most likely disrupt what type of stabilizing interaction?

Accepted Answer

A) salt bridges 
B) hydrogen bonds 
C) disulfide bonds 
D) hydrophobic interactions 
E) hydrophilic interactions 
A) salt bridges 
B) hydrogen bonds 
C) disulfide bonds 
D) hydrophobic interactions 
E) hydrophilic interactions

Question 4

Which type of interaction is not directly involved in maintaining tertiary structure?

Accepted Answer

A) disulfide bridges 
B) hydrogen bonding 
C) peptide bonds 
D) salt bridges 
E) hydrophobic interactions 
A) disulfide bridges 
B) hydrogen bonding 
C) peptide bonds 
D) salt bridges 
E) hydrophobic interactions

Question 5

Which amino acid is a secondary amine with its nitrogen and the alpha-carbon joined as part of a ring structure?

Accepted Answer

A) arginine 
B) glycine 
C) histidine 
D) lysine 
E) proline 
A) arginine 
B) glycine 
C) histidine 
D) lysine 
E) proline

Question 6

The protein configuration that is primarily determined from interactions between R groups is the

Accepted Answer

A) primary structure. 
B) secondary structure. 
C) tertiary structure. 
D) quaternary structure. 
E) none of the above 
A) primary structure. 
B) secondary structure. 
C) tertiary structure. 
D) quaternary structure. 
E) none of the above

Question 7

All of the following are non-covalent interactions important in maintaining the secondary,tertiary,and quaternary aspects of amino acids except

Accepted Answer

A) sulfur-sulfur bonds. 
B) hydrogen bonding along the backbone. 
C) hydrogen bonding between R groups. 
D) salt bridges between R groups. 
E) hydrophobic interactions between R groups. 
A) sulfur-sulfur bonds. 
B) hydrogen bonding along the backbone. 
C) hydrogen bonding between R groups. 
D) salt bridges between R groups. 
E) hydrophobic interactions between R groups.

Question 8

Match the following.
-zwitterion

Accepted Answer

A) a protein that produces only amino acids upon hydrolysis 
B) the form of an amino acid in which both the carboxyl group and the amine group are charged,but the overall molecule remains neutral 
C) a protein that is usually insoluble in water,is very tough,and has a long shape 
D) a carbon atom bonded to four different groups and therefore able to form enantiomers 
E) a protein with the tertiary structure in which it normally occurs in living systems
F)refers to R groups that do not interact readily with water because they are non-polar
G)a protein that is usually water soluble,having a hydrophilic exterior and hydrophobic interior,and an overall rounded shape
H)refers to R groups which form hydrogen bonds with water because of their polarity
I)a protein that produces amino acids and other biomolecules or inorganic substances upon hydrolysis 
A) a protein that produces only amino acids upon hydrolysis 
B) the form of an amino acid in which both the carboxyl group and the amine group are charged,but the overall molecule remains neutral 
C) a protein that is usually insoluble in water,is very tough,and has a long shape 
D) a carbon atom bonded to four different groups and therefore able to form enantiomers 
E) a protein with the tertiary structure in which it normally occurs in living systems
F)refers to R groups that do not interact readily with water because they are non-polar
G)a protein that is usually water soluble,having a hydrophilic exterior and hydrophobic interior,and an overall rounded shape
H)refers to R groups which form hydrogen bonds with water because of their polarity
I)a protein that produces amino acids and other biomolecules or inorganic substances upon hydrolysis

Question 9

The side chains or R groups of amino acids can be classified into each of the following categories except

Accepted Answer

A) polar. 
B) non-polar. 
C) basic. 
D) acidic. 
E) isoelectric. 
A) polar. 
B) non-polar. 
C) basic. 
D) acidic. 
E) isoelectric.

Question 10

Serum albumin is an example of a(an)

Accepted Answer

A) enzyme. 
B) structural protein. 
C) storage protein. 
D) transport protein. 
E) protective protein. 
A) enzyme. 
B) structural protein. 
C) storage protein. 
D) transport protein. 
E) protective protein.

Question 11

Match the following.
-native protein

Accepted Answer

A) a protein that produces only amino acids upon hydrolysis 
B) the form of an amino acid in which both the carboxyl group and the amine group are charged,but the overall molecule remains neutral 
C) a protein that is usually insoluble in water,is very tough,and has a long shape 
D) a carbon atom bonded to four different groups and therefore able to form enantiomers 
E) a protein with the tertiary structure in which it normally occurs in living systems
F)refers to R groups that do not interact readily with water because they are non-polar
G)a protein that is usually water soluble,having a hydrophilic exterior and hydrophobic interior,and an overall rounded shape
H)refers to R groups which form hydrogen bonds with water because of their polarity
I)a protein that produces amino acids and other biomolecules or inorganic substances upon hydrolysis 
A) a protein that produces only amino acids upon hydrolysis 
B) the form of an amino acid in which both the carboxyl group and the amine group are charged,but the overall molecule remains neutral 
C) a protein that is usually insoluble in water,is very tough,and has a long shape 
D) a carbon atom bonded to four different groups and therefore able to form enantiomers 
E) a protein with the tertiary structure in which it normally occurs in living systems
F)refers to R groups that do not interact readily with water because they are non-polar
G)a protein that is usually water soluble,having a hydrophilic exterior and hydrophobic interior,and an overall rounded shape
H)refers to R groups which form hydrogen bonds with water because of their polarity
I)a protein that produces amino acids and other biomolecules or inorganic substances upon hydrolysis

Question 12

Which pair of amino acids can have ionic interactions?

Accepted Answer

A) arginine and glutamic acid 
B) asparagine and lysine 
C) leucine and alanine 
D) glutamic acid and serine 
E) glycine and asparagine 
A) arginine and glutamic acid 
B) asparagine and lysine 
C) leucine and alanine 
D) glutamic acid and serine 
E) glycine and asparagine

Question 13

In the tetrapeptide Ala-Cys-Val-Leu,the N-terminal amino acid is ________.

Accepted Answer

A) Ala 
B) Cys 
C) Val 
D) Leu 
E) none of the above 
A) Ala 
B) Cys 
C) Val 
D) Leu 
E) none of the above

Question 14

All of the following are examples of denaturing proteins except

Accepted Answer

A) souring of milk. 
B) a mild sunburn. 
C) using a curling iron on your hair. 
D) pounding meat to tenderize it. 
E) digestion of a meal. 
A) souring of milk. 
B) a mild sunburn. 
C) using a curling iron on your hair. 
D) pounding meat to tenderize it. 
E) digestion of a meal.

Question 15

The two protein chains in insulin are held together by ________.

Accepted Answer

A) disulfide linkages 
B) hydrophobic interactions 
C) hydrogen bonds 
D) salt bridges 
E) All of the above 
A) disulfide linkages 
B) hydrophobic interactions 
C) hydrogen bonds 
D) salt bridges 
E) All of the above

Question 16

When a glycoprotein is hydrolyzed,the products would include

Accepted Answer

A) amino acids only. 
B) amino acids plus metal ions. 
C) amino acids plus carbohydrates. 
D) amino acids plus lipids. 
E) amino acids plus RNA. 
A) amino acids only. 
B) amino acids plus metal ions. 
C) amino acids plus carbohydrates. 
D) amino acids plus lipids. 
E) amino acids plus RNA.

Question 17

List three denaturing agents that can act on proteins and explain how each one disrupts the protein's structure.

Accepted Answer

1.heat; affects weak interactions betwee

Question 18

Which of these amino acids has a thiol group as part of its side chain?

Accepted Answer

A) cysteine 
B) tyrosine 
C) histidine 
D) threonine 
E) methionine 
A) cysteine 
B) tyrosine 
C) histidine 
D) threonine 
E) methionine

Question 19

Which amino acid is classified as basic?

Accepted Answer

A) valine 
B) threonine 
C) phenylalanine 
D) lysine 
E) glutamic acid 
A) valine 
B) threonine 
C) phenylalanine 
D) lysine 
E) glutamic acid

Question 20

Which pair of amino acids can form hydrogen bonds between their R groups?

Accepted Answer

A) arginine and glutamate 
B) aspartate and lysine 
C) leucine and alanine 
D) glutamine and serine 
E) glycine and asparagine 
A) arginine and glutamate 
B) aspartate and lysine 
C) leucine and alanine 
D) glutamine and serine 
E) glycine and asparagine

Exam 18: Amino Acids and Proteins

Which amino acid is not chiral?

Detergents would most likely disrupt what type of stabilizing interaction?

Which type of interaction is not directly involved in maintaining tertiary structure?

Which amino acid is a secondary amine with its nitrogen and the alpha-carbon joined as part of a ring structure?

The protein configuration that is primarily determined from interactions between R groups is the

All of the following are non-covalent interactions important in maintaining the secondary,tertiary,and quaternary aspects of amino acids except

Match the following. -zwitterion

The side chains or R groups of amino acids can be classified into each of the following categories except

Serum albumin is an example of a(an)

Match the following. -native protein

Which pair of amino acids can have ionic interactions?

In the tetrapeptide Ala-Cys-Val-Leu,the N-terminal amino acid is ________.

All of the following are examples of denaturing proteins except

The two protein chains in insulin are held together by ________.

When a glycoprotein is hydrolyzed,the products would include

List three denaturing agents that can act on proteins and explain how each one disrupts the protein's structure.

Which of these amino acids has a thiol group as part of its side chain?

Which amino acid is classified as basic?

Which pair of amino acids can form hydrogen bonds between their R groups?

Matter and Measurements

Atoms and the Periodic Table

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Enzymes and Vitamins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

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