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- 1. Multiple Choice
Which item is the predominant factor in protein stability?
disulfide bonds
the hydrophobic effect
salt bridges
nonpeptide covalent bonds
- 2. Multiple Choice
Which statement regarding protein structure is true?
Entropy is generally not a consideration when
determining stability.
Van der Waals interactions are insignificant.
Hydrophilic side chains are never found in the interior.
Hydrophobic side chains are usually in the interior of
the native structure.
- 3. Multiple Choice
The α helix is:
affected by the identities of the residues near each end.
stabilized by amino acid R-group interactions.
a left-handed helix with 3.6 amino acids per turn.
stabilized primarily by the hydrophobic effect.
- 4. Multiple Choice
Which statement regarding the tertiary structure of proteins is false?
Amino acid residues far apart in primary structure may
interact with each other in the tertiary structure.
The tertiary structure of a protein is destabilized by the
hydrophobic effect.
Many proteins can be classified as either globular or
fibrous (but not both).
Quaternary structure is the description of how the
tertiary structures in a multisubunit protein are
arranged with respect to each other.
- 5. Multiple Choice
Quaternary structure:
describes how oligomers are assembled into protomers.
refers to proteins with identical subunits.
refers to proteins with four subunits.
refers to an arrangement of tertiary protein subunits in
a three-dimensional complex.
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