Question 1

Proteins that consist of two or more chains assembled into a large 3-dimensional structure are said to display

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 D

Question 2

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 A

Question 3

Match the following.
-simple protein

Accepted Answer

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

Question 4

Match the following.
-hydrophobic

Accepted Answer

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

Question 5

Members of which class of biomolecules are the building blocks of proteins?

Accepted Answer

A) glycerols 
B) monosaccharides 
C) fatty acids 
D) amino acids 
E) nucleic acids 
A) glycerols 
B) monosaccharides 
C) fatty acids 
D) amino acids 
E) nucleic acids

Question 6

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 7

Which molecule is an alpha amino acid?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 8

Two functional groups that are present in all amino acids are the ________ group and the ________ group.

Accepted Answer

A) hydroxyl;amide 
B) carboxyl;amine 
C) carboxyl;phosphate ester 
D) acetal;amine 
E) carbonyl;amide 
A) hydroxyl;amide 
B) carboxyl;amine 
C) carboxyl;phosphate ester 
D) acetal;amine 
E) carbonyl;amide

Question 9

Protein denaturation results in a disruption of the

Accepted Answer

A) primary structure. 
B) secondary and tertiary structure. 
C) primary and secondary structure. 
D) quaternary structure. 
A) primary structure. 
B) secondary and tertiary structure. 
C) primary and secondary structure. 
D) quaternary structure.

Question 10

Match the following.
-zwitterion

Accepted Answer

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

Question 11

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

Question 12

In the tetrapeptide Ala-Cys-Val-Leu,the C-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 13

All of the following can denature proteins without hydrolysis except

Accepted Answer

A) heat. 
B) mechanical stress. 
C) enzyme treatment. 
D) lowering of pH. 
E) heavy metal ions. 
A) heat. 
B) mechanical stress. 
C) enzyme treatment. 
D) lowering of pH. 
E) heavy metal ions.

Question 14

The type of bonding that maintains the secondary structure in a protein is the

Accepted Answer

A) hydrogen bonds between the carbonyl and amino groups of the backbone. 
B) covalent bond between the carbonyl and amino groups of the amino acids. 
C) hydrogen bonds between two amino acids. 
D) disulfide bonds that hold two polypeptide chains together. 
E) hydrogen bonds between two amino groups. 
A) hydrogen bonds between the carbonyl and amino groups of the backbone. 
B) covalent bond between the carbonyl and amino groups of the amino acids. 
C) hydrogen bonds between two amino acids. 
D) disulfide bonds that hold two polypeptide chains together. 
E) hydrogen bonds between two amino groups.

Question 15

The difference between normal and sickle cell hemoglobin is in which structure?

Accepted Answer

A) primary 
B) secondary 
C) tertiary 
D) quaternary 
A) primary 
B) secondary 
C) tertiary 
D) quaternary

Question 16

The C-terminal amino acid in the peptide Ala-Leu-Gly-His-Pro is

Accepted Answer

A) alanine. 
B) leucine. 
C) glycine. 
D) histidine. 
E) proline. 
A) alanine. 
B) leucine. 
C) glycine. 
D) histidine. 
E) proline.

Question 17

Which of the following is the structure for the amino acid with the abbreviation of Phe?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 18

Which structure among the following represents an amide (protein)bond?

Accepted Answer

A)    
B) 
  
C) 
  
D) 
  
E) 
  
A)    
B) 
  
C) 
  
D) 
  
E)

Question 19

The tripeptide represented as ala-leu-gly is named

Accepted Answer

A) alanine-glycine-leucine. 
B) alanylglycylleucine. 
C) alanine-leucine-glycine. 
D) alanylleucylglycine. 
E) none of these 
A) alanine-glycine-leucine. 
B) alanylglycylleucine. 
C) alanine-leucine-glycine. 
D) alanylleucylglycine. 
E) none of these

Question 20

All of the following are examples of fibrous proteins except

Accepted Answer

A) wool. 
B) fingernails. 
C) skin. 
D) insulin. 
E) bones. 
A) wool. 
B) fingernails. 
C) skin. 
D) insulin. 
E) bones.

Exam 18: Amino Acids and Proteins

Proteins that consist of two or more chains assembled into a large 3-dimensional structure are said to display

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

Match the following. -simple protein

Match the following. -hydrophobic

Members of which class of biomolecules are the building blocks of proteins?

Which amino acid is not chiral?

Which molecule is an alpha amino acid?

Two functional groups that are present in all amino acids are the ________ group and the ________ group.

Protein denaturation results in a disruption of the

Match the following. -zwitterion

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

In the tetrapeptide Ala-Cys-Val-Leu,the C-terminal amino acid is

All of the following can denature proteins without hydrolysis except

The type of bonding that maintains the secondary structure in a protein is the

The difference between normal and sickle cell hemoglobin is in which structure?

The C-terminal amino acid in the peptide Ala-Leu-Gly-His-Pro is

Which of the following is the structure for the amino acid with the abbreviation of Phe?

Which structure among the following represents an amide (protein)bond?

The tripeptide represented as ala-leu-gly is named

All of the following are examples of fibrous proteins except

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

Aldehydes and Ketones

Amines

Carboxylic Acids and Their Derivatives

Enzymes and Vitamins

Carbohydrates

The Generation of Biochemical Energy

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Protein and Amino Acid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

Two functional groups that are present in all amino acids are the group and the group.