Macromolecules and Thermodynamics Quiz
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Questions and Answers

What is the predominant factor in protein stability?

  • Disulfide bond
  • Hydrophobic effect (correct)
  • Salt bridges
  • Nonpeptide covalent bonds

    • Which statement regarding protein structure is true?

  • Hydrophobic side chains are in the interior of the native protein (correct)
  • Hydrophilic side chains are never found in the interior
  • Van der Waals interaction are insignificant
  • Entropy is not a consideration when determining stability

    • Why is there so little allowable rotation in the peptide bond?

  • Peptide bonds are amide bonds
  • The partial double bond character makes the peptide bond planar (correct)
  • The C-N bond is shorter
  • The R group prevent rotation about the peptide bond except for glycine
  • Peptide bonds are only formed in the cis configuration

    • The α helix is

    <p>Stabilized by amino acid R groups</p> Signup and view all the answers

    The β sheet

    <p>Is primarily stabilized by hydrogen bonds</p> Signup and view all the answers

    Which is the more stable Beta sheet: parallel or antiparallel?

    <p>Antiparallel due to more linear hydrogen bonds</p> Signup and view all the answers

    Which statement regarding the tertiary structure of proteins is false?

    <p>Many proteins can be classified as either globular or fibrous, but not both</p> Signup and view all the answers

    Denaturing followed by renaturing of a protein:

    <p>Demonstrates that primary structure dictates tertiary structure</p> Signup and view all the answers

    What are the four main types of macromolecules?

    <p>Nucleic acids, proteins, carbohydrates, lipids</p> Signup and view all the answers

    Which weak interaction is responsible for the formation of secondary protein structures like alpha helix and beta sheet?

    <p>H-bonding</p> Signup and view all the answers

    What is the primary function of myoglobin?

    <p>Storing oxygen in muscle cells</p> Signup and view all the answers

    Which factor contributes to the Bohr effect in hemoglobin?

    <p>Decrease in pH</p> Signup and view all the answers

    What type of bond links amino acids together in a protein?

    <p>Peptide bond</p> Signup and view all the answers

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