Question 1

Hemoglobin is an example of this type of protein.

Accepted Answer

A)  receptors 
B)  structural proteins 
C)  immunoglobulins 
D)  transport proteins 
E)  dietary proteins 
A)  receptors 
B)  structural proteins 
C)  immunoglobulins 
D)  transport proteins 
E)  dietary proteins

Question 2

A protein folds into a unique and specific three-dimensional shape known as a __________that is necessary for the performance of the protein's biological function.

Accepted Answer

A)  membrane 
B)  architecture 
C)  scaffold 
D)  native conformation 
E)  isomer 
A)  membrane 
B)  architecture 
C)  scaffold 
D)  native conformation 
E)  isomer

Question 3

Enzymes are typically composed of this type of protein.

Accepted Answer

A)  keratin 
B)  keratin, elastin, and collagen 
C)  membrane proteins and globular proteins 
D)  globular proteins 
E)  membrane proteins 
A)  keratin 
B)  keratin, elastin, and collagen 
C)  membrane proteins and globular proteins 
D)  globular proteins 
E)  membrane proteins

Question 4

Which of the following occurs when a protein is denatured? I.Covalent bonds are broken.
II)Hydrogen bonds are broken.
III)The protein loses its shape.
IV)The protein loses its biological activity.

Accepted Answer

A)  All of these are correct statements. 
B)  All of these statements, except IV, are correct. 
C)  All of these statements, except I, are correct. 
D)  Only II and III are correct. 
E)  None of these statements is correct. 
A)  All of these are correct statements. 
B)  All of these statements, except IV, are correct. 
C)  All of these statements, except I, are correct. 
D)  Only II and III are correct. 
E)  None of these statements is correct.

Question 5

What kinds of interactions are NOT part of tertiary protein structure?

Accepted Answer

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

Question 6

Which side chain would MOST likely be found in the interior of a protein, away from the aqueous environment?

Accepted Answer

A)  -CH2OH 
B)  -CH2SH 
C)  -CH2COOH 
D)  -CH2CONH2 
E)    
A)  -CH2OH 
B)  -CH2SH 
C)  -CH2COOH 
D)  -CH2CONH2 
E)

Question 7

Which statement BEST defines an essential amino acid?

Accepted Answer

A)  It is an amino acid that is necessary for life. 
B)  It is an amino acid that is synthesized in the body. 
C)  It is any of the 20 amino acids. 
D)  It is another name for the nonpolar amino acids. 
E)  It is an amino acid that cannot be produced by the body. 
A)  It is an amino acid that is necessary for life. 
B)  It is an amino acid that is synthesized in the body. 
C)  It is any of the 20 amino acids. 
D)  It is another name for the nonpolar amino acids. 
E)  It is an amino acid that cannot be produced by the body.

Question 8

The boxed bond in the following peptide is a

Accepted Answer

A)  peptide bond. 
B)  ionic bond. 
C)  nonpolar covalent bond. 
D)  hydrogen bond. 
E)  chiral carbon. 
A)  peptide bond. 
B)  ionic bond. 
C)  nonpolar covalent bond. 
D)  hydrogen bond. 
E)  chiral carbon.

Question 9

Which statement about fibrous proteins is TRUE?

Accepted Answer

A)  Fibrous proteins are soluble in water. 
B)  Fibrous proteins usually contain both β sheets and α-helices. 
C)  Fibrous proteins are the most common structural protein in the body. 
D)  Fibrous proteins are always rigid. 
E)  Hemoglobin is an example of a fibrous protein. 
A)  Fibrous proteins are soluble in water. 
B)  Fibrous proteins usually contain both β sheets and α-helices. 
C)  Fibrous proteins are the most common structural protein in the body. 
D)  Fibrous proteins are always rigid. 
E)  Hemoglobin is an example of a fibrous protein.

Question 10

Tamoxifen is a drug used to prevent the recurrence of certain types of breast cancers that require estrogen to grow.Tamoxifen binds to the active site of the estrogen receptor protein, preventing estrogen from binding to the enzyme.Once Tamoxifen binds to the protein, the protein is permanently deactivated.Which descriptions BEST fits Tamoxifen?

Accepted Answer

A)  Tamoxifen is an irreversible, noncompetitive inhibitor. 
B)  Tamoxifen is a reversible, noncompetitive inhibitor. 
C)  Tamoxifen is an irreversible, competitive inhibitor. 
D)  Tamoxifen is a reversible, competitive inhibitor. 
E)  Tamoxifen is not an inhibitor. 
A)  Tamoxifen is an irreversible, noncompetitive inhibitor. 
B)  Tamoxifen is a reversible, noncompetitive inhibitor. 
C)  Tamoxifen is an irreversible, competitive inhibitor. 
D)  Tamoxifen is a reversible, competitive inhibitor. 
E)  Tamoxifen is not an inhibitor.

Question 11

When two amino acids react to form a peptide bond, what new functional group is created?

Accepted Answer

A)  an alcohol 
B)  an amine 
C)  an amide 
D)  an ester 
E)  a phosphoester 
A)  an alcohol 
B)  an amine 
C)  an amide 
D)  an ester 
E)  a phosphoester

Question 12

Which structure is the enantiomer of L-alanine?

Accepted Answer

A)  structure a 
B)  structure b 
C)  structure c 
D)  structure d 
E)  structure e 
A)  structure a 
B)  structure b 
C)  structure c 
D)  structure d 
E)  structure e

Question 13

How is the following amino acid classified?

Accepted Answer

A)  nonpolar 
B)  polar neutral 
C)  polar acidic 
D)  polar basic 
E)  None of the above is a correct classification. 
A)  nonpolar 
B)  polar neutral 
C)  polar acidic 
D)  polar basic 
E)  None of the above is a correct classification.

Question 14

Which biomolecule has the MOST diverse functions in the body?

Accepted Answer

A)  carbohydrates 
B)  proteins 
C)  nucleic acids 
D)  lipids 
E)  These have equally diverse functions. 
A)  carbohydrates 
B)  proteins 
C)  nucleic acids 
D)  lipids 
E)  These have equally diverse functions.

Hemoglobin is an example of this type of protein.

A protein folds into a unique and specific three-dimensional shape known as a __________that is necessary for the performance of the protein's biological function.

Enzymes are typically composed of this type of protein.

Which of the following occurs when a protein is denatured? I.Covalent bonds are broken. II)Hydrogen bonds are broken. III)The protein loses its shape. IV)The protein loses its biological activity.

What kinds of interactions are NOT part of tertiary protein structure?

Which side chain would MOST likely be found in the interior of a protein, away from the aqueous environment?

Which statement BEST defines an essential amino acid?

The boxed bond in the following peptide is a

Which statement about fibrous proteins is TRUE?

When two amino acids react to form a peptide bond, what new functional group is created?

Which structure is the enantiomer of L-alanine?

How is the following amino acid classified?

Which biomolecule has the MOST diverse functions in the body?

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

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Exam 16: Proteins: Structure and Function

Hemoglobin is an example of this type of protein.

A protein folds into a unique and specific three-dimensional shape known as a __________that is necessary for the performance of the protein's biological function.

Enzymes are typically composed of this type of protein.

Which of the following occurs when a protein is denatured? I.Covalent bonds are broken. II)Hydrogen bonds are broken. III)The protein loses its shape. IV)The protein loses its biological activity.

What kinds of interactions are NOT part of tertiary protein structure?

Which side chain would MOST likely be found in the interior of a protein, away from the aqueous environment?

Which statement BEST defines an essential amino acid?

The boxed bond in the following peptide is a

Which statement about fibrous proteins is TRUE?

When two amino acids react to form a peptide bond, what new functional group is created?

Which structure is the enantiomer of L-alanine?

How is the following amino acid classified?

Which biomolecule has the MOST diverse functions in the body?

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters