Protein Structure and Amino Acids Quiz
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Questions and Answers

What stabilizes the folded structure of a protein?

  • Peptide bonds
  • RNA sequences
  • Phospholipid bilayers
  • Noncovalent interactions (correct)
  • What is the term for the compact three-dimensional regions in the structure of a protein?

  • Amino acid sequence
  • Enzyme substrate
  • Protein domains (correct)
  • Polypeptide backbone
  • What do we call a protein that catalyzes the formation or breakage of a specific covalent bond in a ligand?

  • Substrate
  • Enzyme (correct)
  • Polypeptide
  • Hydrogen bond
  • What induces a significant change in protein shape outside of the active site of an enzyme?

    <p>Binding of small ligands</p> Signup and view all the answers

    What is the term for the regulation of an enzyme by the binding of one of the pathway's end products?

    <p>Feedback inhibition</p> Signup and view all the answers

    Which type of proteins act as molecular switches that are active with GTP bound and inactive with GDP bound?

    <p>GTP-binding proteins</p> Signup and view all the answers

    What type of proteins can exist in two conformations that differ in catalytic activity and can be turned on or off by ligands?

    <p>Allosteric proteins</p> Signup and view all the answers

    Which process controls the location and function of a protein and can serve as docking sites for other proteins?

    <p>Covalent modifications</p> Signup and view all the answers

    What type of protein machines are formed by assemblies of allosteric proteins to perform complex functions?

    <p>Allosteric protein machines</p> Signup and view all the answers

    What forms as phase-separated biomolecular condensates, speeding important reactions and confining them to specific regions of the cell?

    <p>Biochemical subcompartments</p> Signup and view all the answers

    What is the term for the unique amino acid sequence of a protein that determines its three-dimensional shape and biological activity?

    <p>Protein primary structure</p> Signup and view all the answers

    Which type of interaction stabilizes the folded structure of a protein through hydrogen bonds between neighboring regions of the polypeptide backbone?

    <p>Hydrophobic interactions</p> Signup and view all the answers

    What do we call the small ligands that can induce a significant change in protein shape outside of the active site of an enzyme?

    <p>Activators</p> Signup and view all the answers

    What term is used for the compact three-dimensional regions within the structure of a protein, which are known to exist as independent folding units?

    <p>Tertiary domains</p> Signup and view all the answers

    What type of regulation involves an enzyme being inhibited by the binding of one of the pathway's end products?

    <p>Allosteric regulation</p> Signup and view all the answers

    Which proteins act as molecular switches, being active when GTP is bound and inactive when GDP is bound?

    <p>GTP-binding proteins</p> Signup and view all the answers

    What type of proteins form highly efficient protein machines through coordinated conformational changes?

    <p>Allosteric proteins</p> Signup and view all the answers

    What controls the location and function of a protein and can serve as docking sites for other proteins?

    <p>Covalent modifications</p> Signup and view all the answers

    What produces directed movement in eukaryotic cells through conformational changes linked to the hydrolysis of a tightly bound molecule of ATP to ADP?

    <p>Motor proteins</p> Signup and view all the answers

    What form as phase-separated biomolecular condensates, speeding important reactions and confining them to specific regions of the cell?

    <p>Biochemical subcompartments</p> Signup and view all the answers

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