Interaction between two amino acids shown below can help to stabilize
the structure of a protein. What is the interaction?
(1 Point)
Hydrogen bond
Ionic bond
Disulfide bond
Hydrophobic interaction
19
What type of
...
Interaction between two amino acids shown below can help to stabilize
the structure of a protein. What is the interaction?
(1 Point)
Hydrogen bond
Ionic bond
Disulfide bond
Hydrophobic interaction
19
What type of bond is responsible for the primary structure of a protein?
(1 Point)
Hydrogen bond
Glycosidic bond
Peptide bond
Ionic bond
20
Several types of side chain interactions stabilize the tertiary structure
of proteins, including which of the following?
(1 Point)
Hydrogen bonds, phosphodiester bonds, peptide bonds, covalent bonds
Ionic bonds, peptide bonds, protein bonds, hydrogen bonds
Ionic bonds, hydrophobic interactions, hydrogen bonds, disulfide bonds
Peptide bonds, hydrogen bonds, ester bonds and covalent bonds
21
Which of the following statements about the secondary structure of
proteins is true? You may select more than one answer.
(1 Point)
It involves hydrogen bonding between atoms in the backbone
It includes alpha helices
It includes beta pleated sheets
It involves hydrogen bonding between amino acid sidechains
22
In a certain protein, a mutation occurred that changed the first
member of a Glutamate-Arginine pair where Glutamate was a mutated
to Lysine, resulting in a Lysine-Arginine pair. Which amino acid from the
choices below could the Arginine be mutated to in order to restore the
original interaction?
(1 Point)
Lysine
Arginine
Either Aspartate or Glutamate
23
Which of the following forces can lead to aggregation as a result of
protein misfolding?
(1 Point)
Disulfide bonds
Hydrogen bonds
Ionic bonds
Hydrophobic interactions
24
Aggregation of proteins is the main reason behind many
neurodegenarative diseases. Which one of the following mutations will
likely cause a neurodegenerative disease?
(1 Point)
Replacing a positively charged amino acid with a negatively charged amino acid
Replacing a polar amino acid with a nonpolar amino acid
Replacing a polar amino acid with another polar amino acid
Replacing negatively charged amino acid with a negatively charged amino acid
25
Slow-cooker recipes will occasionally call for addition of a soda pop or
cola to tenderize a pot roast. What types of bond or interactions in
proteins would most likely be disrupted by the addition of an acidic
soda pop or cola?
(1 Point)
The carbonic acid disrupts ionic bonds
The dark cola additives disrupts disulfide bonds
The residual aluminum from the can disrupts hydrophobic interactions
26
As a piece of bacon is heated in a skillet on the stove, you may
observe that the appearance of the bacon changes. What types of
bonds or interactions in proteins are susceptible to temperature
changes and why?
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