Question 1

Which of the following is NOT a function of proteins?

Accepted Answer

A)  movement of muscles
B)  catalyze reactions in the cells
C)  provide structural components
D)  store the genetic information of a living organism
E)  transport substances through the bloodstreamF) C) and E)
G) A) and B)

Question 2

Hydrophobic interactions help to stabilize the ________ structure(s) of a protein.

Accepted Answer

A)  secondary
B)  secondary and tertiary
C)  primary
D)  secondary and quaternary
E)  tertiary and quaternaryF) A) and D)
G) A) and B)

Question 3

A basic amino acid has an R group that contains

Accepted Answer

A)  a methyl group.
B)  an amine group.
C)  a carboxyl group.
D)  a thiol group.
E)  an alcohol group.F) A) and D)
G) All of the above

Question 4

Sucrase, the protein that facilitates the hydrolysis of sucrose, would be classified as a(n) ________ protein.

Accepted Answer

A)  structural
B)  enzymatic
C)  transport
D)  contractile
E)  hormonalF) C) and E)
G) A) and B)

Question 5

Give the correct name and three and one letter abbreviation for the amino acid shown.

Accepted Answer

A)   Tyrosine, Tyr, T
B)   Tryptophan, Trp, T
C)   Tryptophan, Trp, W
D)   Phenylalanine, Phe,  P 
E)   Phenylalanine, Phe,  FF) C) and D)
G) All of the above

Question 6

Which of the following combinations of food would supply all the essential amino acids?

Accepted Answer

A)  corn and oats
B)  corn and wheat
C)  beans and almonds
D)  beans and soy
E)  oats and peasF) B) and E)
G) A) and B)

Question 7

Disulfide bonds in a protein chain connect

Accepted Answer

A)  two asparagine residues.
B)  an amine and a carboxylic acid group.
C)  an alcohol and a carboxylic acid group.
D)  tryptophan and alanine residues.
E)  two cysteine residues.F) A) and B)
G) A) and C)

Question 8

In a typical amino acid at physiological pH, the carboxylate is

Accepted Answer

A)  positively charged.
B)  attached to an amine.
C)  negatively charged.
D)  soluble in a nonpolar solvent.
E)  neutral.F) A) and B)
G) A) and E)

Question 9

In an enzyme, the polypeptide chain folds into a compact shape known as the ________ structure.

Accepted Answer

A)  primary
B)  secondary
C)  quaternary
D)  tertiary
E)  pleatedF) C) and D)
G) A) and B)

Question 10

In the peptide Ser-Cys-Ala-Gly, the C-terminal end is

Accepted Answer

A)  serotonin.
B)  glycine.
C)  serine.
D)  alanine.
E)  glycerine.F) None of the above
G) A) and D)

Question 11

The ionized form of nearly all amino acids at physiological pH has a net charge of ________.

Accepted Answer

The answer of The ionized form of nearly all amino...

Question 12

A chain made of more than 50 amino acids is usually referred to as a(n)

Accepted Answer

A)  globulin.
B)  peptide.
C)  enzyme.
D)  hormone.
E)  protein.F) C) and D)
G) A) and D)

Question 13

Denaturation of a protein

Accepted Answer

A)  is always irreversible.
B)  disrupts the secondary, tertiary, or quaternary structure of a protein.
C)  changes the primary structure of a protein.
D)  can only occur in a protein with quaternary structure.
E)  hydrolyzes peptide bonds.F) A) and C)
G) B) and E)

Question 14

Collagen, a protein found in tendons and cartilage, would be classified as a ________ protein.

Accepted Answer

A)  catalytic
B)  structural
C)  hormone
D)  transport
E)  storageF) A) and B)
G) A) and D)

Question 15

When two protein chains combine to form an active protein, the structural level is ________.

Accepted Answer

A)  tertiary
B)  quaternary
C)  pleated
D)  secondary
E)  primaryF) A) and D)
G) A) and E)

Question 16

The structural formulas of amino acids are the same EXCEPT for the

Accepted Answer

A)  alpha carbon.
B)  hydrogen bonding.
C)  carboxyl group.
D)  side chain or R group.
E)  amino group.F) C) and D)
G) A) and E)

Question 17

What type of interaction would you expect between the following R groups in the tertiary structure of a protein?

Accepted Answer

A)  disulfide bonds
B)  salt bridges
C)  hydrogen bonds
D)  hydrophobic interactions
E)  peptide bondsF) None of the above
G) A) and B)

Question 18

What process occurs when heat, acids, bases, and heavy metal ions cause a loss of biological function of a protein?

Accepted Answer

A)  denaturation
B)  saponification
C)  amidation
D)  esterification
E)  hydrogenationF) None of the above
G) C) and E)

Question 19

Circle the peptide bond in this structure.

Accepted Answer

The answer of Circle the peptide bond in this structure.
...

Question 20

What type of interaction occurs between the R groups of two serines?

Accepted Answer

A)  salt bridge
B)  hydrophilic
C)  disulfide bond
D)  hydrophobic
E)  hydrogen bondF) C) and E)
G) A) and E)

Exam 19: Amino Acids and Proteins

When two protein chains combine to form an active protein, the structural level is ________.

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Disulfide bonds in a protein chain connect

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A chain made of more than 50 amino acids is usually referred to as a(n)

Correct AnswerverifiedShow Answer

The structural formulas of amino acids are the same EXCEPT for the

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In a typical amino acid at physiological pH, the carboxylate is

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In an enzyme, the polypeptide chain folds into a compact shape known as the ________ structure.

Correct AnswerverifiedShow Answer

Collagen, a protein found in tendons and cartilage, would be classified as a ________ protein.

Correct AnswerverifiedShow Answer

A basic amino acid has an R group that contains

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Denaturation of a protein

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Sucrase, the protein that facilitates the hydrolysis of sucrose, would be classified as a(n) ________ protein.

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Which of the following is NOT a function of proteins?

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What process occurs when heat, acids, bases, and heavy metal ions cause a loss of biological function of a protein?

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Which of the following combinations of food would supply all the essential amino acids?

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Circle the peptide bond in this structure.

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What type of interaction occurs between the R groups of two serines?

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Hydrophobic interactions help to stabilize the ________ structure(s) of a protein.

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What type of interaction would you expect between the following R groups in the tertiary structure of a protein?

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The ionized form of nearly all amino acids at physiological pH has a net charge of ________.

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Give the correct name and three and one letter abbreviation for the amino acid shown.

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In the peptide Ser-Cys-Ala-Gly, the C-terminal end is

Correct AnswerverifiedShow Answer

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