Question 1

Match the following.
-conjugated 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 systemsF) refers to R groups that do not interact readily with water because they are non-polarG) a protein that is usually water soluble,having a hydrophilic exterior and hydrophobic interior,and an overall rounded shapeH) refers to R groups which form hydrogen bonds with water because of their polarityI) a protein that produces amino acids and other biomolecules or inorganic substances upon hydrolysisJ) F) and I)
K) A) and B)

Question 2

Which protein is considered to be a globular protein?

Accepted Answer

A)  albumin
B)  keratin
C)  collagen
D)  myosinE) None of the above
F) A) and B)

Question 3

Insulin is an example of a(an)

Accepted Answer

A)  enzyme.
B)  structural protein.
C)  storage protein.
D)  transport protein.
E)  hormone.F) A) and B)
G) A) and C)

Question 4

Match the following.
-simple 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 systemsF) refers to R groups that do not interact readily with water because they are non-polarG) a protein that is usually water soluble,having a hydrophilic exterior and hydrophobic interior,and an overall rounded shapeH) refers to R groups which form hydrogen bonds with water because of their polarityI) a protein that produces amino acids and other biomolecules or inorganic substances upon hydrolysisJ) B) and H)
K) E) and H)

Question 5

Match the following.
-hydrophobic

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 systemsF) refers to R groups that do not interact readily with water because they are non-polarG) a protein that is usually water soluble,having a hydrophilic exterior and hydrophobic interior,and an overall rounded shapeH) refers to R groups which form hydrogen bonds with water because of their polarityI) a protein that produces amino acids and other biomolecules or inorganic substances upon hydrolysisJ) B) and I)
K) A) and B)

Question 6

The peptide bond joining amino acids into proteins is a specific example of the ________ bond.

Accepted Answer

A)  amide
B)  carbonyl
C)  ester
D)  glycosidic
E)  hydrogenF) A) and E)
G) A) and D)

Question 7

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 theseF) A) and E)
G) A) and D)

Question 8

List three properties of enantiomers that are the same and three properties that are different.

Accepted Answer

Same:molecular formula,connections betwe...

Question 9

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.F) A) and E)
G) C) and D)

Question 10

Match the following.
-globular 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 systemsF) refers to R groups that do not interact readily with water because they are non-polarG) a protein that is usually water soluble,having a hydrophilic exterior and hydrophobic interior,and an overall rounded shapeH) refers to R groups which form hydrogen bonds with water because of their polarityI) a protein that produces amino acids and other biomolecules or inorganic substances upon hydrolysisJ) A) and D)
K) A) and E)

Question 11

The quaternary structure of hemoglobin contains

Accepted Answer

A)  two subunits.
B)  four subunits.
C)  six subunits.
D)  eight subunits.E) A) and B)
F) B) and C)

Question 12

Which of the following objects is chiral?

Accepted Answer

A)  a Ping-Pong ball
B)  a nail
C)  a shoe
D)  a fork
E)  a windowpaneF) C) and E)
G) B) and D)

Question 13

Collagen is an example of a(an)

Accepted Answer

A)  enzyme.
B)  structural protein.
C)  storage protein.
D)  transport protein.
E)  hormone.F) A) and B)
G) A) and C)

Question 14

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 acidsF) A) and C)
G) A) and B)

Question 15

Which amino acid is classified as neutral and non-polar?

Accepted Answer

A)  aspartic acid
B)  histidine
C)  phenylalanine
D)  lysine
E)  tyrosineF) A) and E)
G) B) and E)

Question 16

By convention,the N-terminal end of a protein is usually placed on the ________ of a protein structure.

Accepted Answer

A)  right side
B)  left side
C)  center
D)  bottom
E)  topF) B) and E)
G) A) and B)

Question 17

Proteins are least soluble in water at

Accepted Answer

A)  their isoelectric point.
B)  low pH.
C)  neutral pH.
D)  high pH.
E)  both high and low pH.F) D) and E)
G) A) and E)

Question 18

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

Accepted Answer

A)  Alanine.
B)  Leucine.
C)  Glycine.
D)  Histidine.
E)  Proline.F) All of the above
G) C) and D)

Question 19

Polar R groups,along with acidic and basic R groups,are said to be ________ because they are attracted to water molecules.

Accepted Answer

A)  hydrophilic
B)  hydrophobic
C)  ionized
D)  unreactive
E)  none of theseF) A) and E)
G) None of the above

Question 20

The type of bond that is most important in maintaining secondary structure of a protein is

Accepted Answer

A)  disulfide bridges.
B)  hydrogen bonding within the backbone.
C)  hydrogen bonding between R groups.
D)  salt bridges.
E)  hydrophobic interactions.F) All of the above
G) B) and E)

Exam 18: Amino Acids and Proteins

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

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List three properties of enantiomers that are the same and three properties that are different.

Correct AnswerverifiedSame:molecular formula,connections betwe...View AnswerShow Answer

The quaternary structure of hemoglobin contains

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Collagen is an example of a(an)

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

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Which of the following objects is chiral?

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Which protein is considered to be a globular protein?

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The peptide bond joining amino acids into proteins is a specific example of the ________ bond.

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Polar R groups,along with acidic and basic R groups,are said to be ________ because they are attracted to water molecules.

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

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Match the following. -simple protein

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Match the following. -conjugated protein

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Proteins are least soluble in water at

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Match the following. -hydrophobic

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Which amino acid is classified as neutral and non-polar?

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Match the following. -globular protein

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By convention,the N-terminal end of a protein is usually placed on the ________ of a protein structure.

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The type of bond that is most important in maintaining secondary structure of a protein is

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The tripeptide represented as ala-leu-gly is named

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Insulin is an example of a(an)

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