Question 1

Every third residue in the protein collagen is _______________.

Accepted Answer

glycine

Question 2

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-The overall structure of a protein is referred to as ____________.
A)amino
B)water
C)protons
D)DNA
E)secondary structure
F)tertiary structure
G)Ramachandran
H)RNA
I)domain
J)cystine
K)proline
L)Sanger
M)D amino acids
N)cysteine

Accepted Answer

The overall structure of a protein is referred to as its tertiary structure, which is determined by the interactions between different regions (such as alpha helices and beta sheets) and side chains of amino acids.

Question 3

The _______________ indicates the left- or right-handedness of an alpha helix.

Accepted Answer

screw sense

Question 4

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-Two amino acids undergo oxidation to form a dimer called ____________.
A)amino
B)water
C)protons
D)DNA
E)secondary structure
F)tertiary structure
G)Ramachandran
H)RNA
I)domain
J)cystine
K)proline
L)Sanger
M)D amino acids
N)cysteine

Accepted Answer

Two cysteine amino acids can form a disulfide bond, also known as a cystine dimer.

Question 5

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: Compact regions that may be connected by a flexible segment of polypeptide chain.
A)amino
B)water
C)protons
D)DNA
E)secondary structure
F)tertiary structure
G)Ramachandran
H)RNA
I)domain
J)cystine
K)proline
L)Sanger
M)D amino acids
N)cysteine

Accepted Answer

Domains are compact regions within a protein that can be connected by flexible segments of the polypeptide chain, allowing for structural flexibility and functional diversity.

Question 6

_______________ is a fibrous protein and is the primary component of wool and hair.

Accepted Answer

The answer of _______________ is a fibrous protein and is...

Question 7

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-The plot that allows one to investigate the likely orientation of certain amino acid pairs is called the ____________.
A)amino
B)water
C)protons
D)DNA
E)secondary structure
F)tertiary structure
G)Ramachandran
H)RNA
I)domain
J)cystine
K)proline
L)Sanger
M)D amino acids
N)cysteine

Accepted Answer

The plot that allows one to investigate the likely orientation of certain amino acid pairs is called the Ramachandran plot.

Question 8

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The type of structure to which α helices, β sheets, and turns are referred.
A)amino
B)water
C)protons
D)DNA
E)secondary structure
F)tertiary structure
G)Ramachandran
H)RNA
I)domain
J)cystine
K)proline
L)Sanger
M)D amino acids
N)cysteine

Accepted Answer

α helices, β sheets, and turns are all examples of secondary structure.

Answer: F
 Tertiary structure refers to the overall 3-dimensional structure of a protein, which can be composed of multiple secondary structures and domains.

Answer: G
 The Ramachandran plot is a graphical representation of the allowed regions for backbone dihedral angles in proteins, which is used to analyze protein folding and structure.

Question 9

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-Changes in ____________ create amyloid fibers which are insoluble and are the source of mad cow disease, and Alzheimer's, and Parkinson's diseases.
A)amino
B)water
C)protons
D)DNA
E)secondary structure
F)tertiary structure
G)Ramachandran
H)RNA
I)domain
J)cystine
K)proline
L)Sanger
M)D amino acids
N)cysteine

Accepted Answer

The answer of Use the following to answer questions
Choose the...

Question 10

The secondary structure that is stabilized by CO and NH hydrogen bonding within the peptide chain is the _______________.

Accepted Answer

The answer of The secondary structure that is stabilized by...

Question 11

The peptide bond is also known as a(n) _______________.

Accepted Answer

The answer of The peptide bond is also known as...

Question 12

Peptides differ from proteins in _______________.

Accepted Answer

The answer of Peptides differ from proteins in _______________....

Question 13

Due to the side group steric clash, almost all peptide bonds are _______________ in their configuration.

Accepted Answer

The answer of Due to the side group steric clash,...

Question 14

Disulfide bonds in proteins can be reduced to free sulfhydryl groups by reagents such as _______________.

Accepted Answer

The answer of Disulfide bonds in proteins can be reduced...

Question 15

The _______________ of a disulfide bridge results in a separation of two protein chains.

Accepted Answer

The answer of The _______________ of a disulfide bridge results...

Question 16

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: This amino acid residue disrupts the α helix because its side chain contains a unique ring structure that restricts bond rotations.
A)amino
B)water
C)protons
D)DNA
E)secondary structure
F)tertiary structure
G)Ramachandran
H)RNA
I)domain
J)cystine
K)proline
L)Sanger
M)D amino acids
N)cysteine

Accepted Answer

Proline is the amino acid residue that disrupts the α helix due to its unique ring structure. The ring structure restricts bond rotations, making it difficult for proline to fit properly within an α helix.

Question 17

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-When a peptide bond is formed, a(n) ____________molecule is also made.
A)amino
B)water
C)protons
D)DNA
E)secondary structure
F)tertiary structure
G)Ramachandran
H)RNA
I)domain
J)cystine
K)proline
L)Sanger
M)D amino acids
N)cysteine

Accepted Answer

When a peptide bond is formed, a water molecule is also made in a dehydration synthesis reaction. This is because the carboxyl group of one amino acid reacts with the amino group of another amino acid, resulting in the release of a water molecule.

Question 18

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: Codes for the sequence of amino acids.
A)amino
B)water
C)protons
D)DNA
E)secondary structure
F)tertiary structure
G)Ramachandran
H)RNA
I)domain
J)cystine
K)proline
L)Sanger
M)D amino acids
N)cysteine

Accepted Answer

DNA is the genetic material that codes for the sequence of amino acids in proteins.

Answer: H
 RNA is also involved in protein synthesis and can code for the sequence of amino acids.

Answer: J 
 Cystine is an amino acid that forms disulfide bonds in the tertiary structure of proteins.

Answer: K 
 Proline is an amino acid that can disrupt the secondary structure of proteins due to its rigid structure.

Answer: N 
 Cysteine is also important in the formation of disulfide bonds in proteins.

Answer: F 
 Tertiary structure refers to the overall 3D shape of a protein, which is determined by the specific sequence of amino acids and interactions between them.

Answer: G 
 The Ramachandran plot is a tool used to analyze the allowed and disallowed regions of dihedral angles in protein structure.

Answer: I 
 A domain is a distinct substructure within a protein that has a specific function or interacts with other molecules.

Answer: L 
 Sanger sequencing is a method for determining the nucleotide sequence of DNA, which can be used to determine the amino acid sequence of a protein.

Question 19

The _______________ β-sheet structure occurs when the two strands are oriented in opposite directions (N →
C).

Accepted Answer

The answer of The _______________ β-sheet structure occurs when the...

Question 20

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-According to convention, ____________ is the terminus drawn on the left side of a peptide.
A)amino
B)water
C)protons
D)DNA
E)secondary structure
F)tertiary structure
G)Ramachandran
H)RNA
I)domain
J)cystine
K)proline
L)Sanger
M)D amino acids
N)cysteine

Accepted Answer

According to convention, the amino terminus is the terminus drawn on the left side of a peptide, while the carboxy terminus is drawn on the right side.

Quiz 4: Protein Three-Dimensional Structure

Every third residue in the protein collagen is _______________.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The overall structure of a protein is referred to as ____________.

The _______________ indicates the left- or right-handedness of an alpha helix.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -Two amino acids undergo oxidation to form a dimer called ____________.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: Compact regions that may be connected by a flexible segment of polypeptide chain.

_______________ is a fibrous protein and is the primary component of wool and hair.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The plot that allows one to investigate the likely orientation of certain amino acid pairs is called the ____________.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: The type of structure to which α helices, β sheets, and turns are referred.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -Changes in ____________ create amyloid fibers which are insoluble and are the source of mad cow disease, and Alzheimer's, and Parkinson's diseases.

The secondary structure that is stabilized by CO and NH hydrogen bonding within the peptide chain is the _______________.

The peptide bond is also known as a(n) _______________.

Peptides differ from proteins in _______________.

Due to the side group steric clash, almost all peptide bonds are _______________ in their configuration.

Disulfide bonds in proteins can be reduced to free sulfhydryl groups by reagents such as _______________.

The _______________ of a disulfide bridge results in a separation of two protein chains.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: This amino acid residue disrupts the α helix because its side chain contains a unique ring structure that restricts bond rotations.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -When a peptide bond is formed, a(n) ____________molecule is also made.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: Codes for the sequence of amino acids.

The _______________ β-sheet structure occurs when the two strands are oriented in opposite directions (N → C).

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -According to convention, ____________ is the terminus drawn on the left side of a peptide.