Membranes Quiz
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Questions and Answers

Which type of proteins bind fatty acids and get inserted into the membrane?

  • Peripheral proteins
  • Lipid-anchored proteins (correct)
  • Integral proteins
  • Translocases
  • What is the main method used to study the mobility of molecules in living cells?

  • Electron microscopy
  • Fluorescence microscopy
  • FRAP (correct)
  • Immunofluorescence
  • Which proteins move phospholipids between layers and maintain lipid asymmetry?

  • Integral proteins
  • Peripheral proteins
  • Lipid-anchored proteins
  • Translocases (correct)
  • Which model envisions the membrane as a fluid bilayer of lipids with a mosaic of associated proteins?

    <p>Fluid mosaic model</p> Signup and view all the answers

    Which type of proteins form weak and reversible associations to the membrane, typically through binding to integral membrane proteins?

    <p>Peripheral membrane proteins</p> Signup and view all the answers

    What type of post-translational modification results in attachment of hydrophobic prenyl groups that anchor small GTPase proteins to intracellular membranes?

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

    Which protein is an example of a lipid-anchored membrane protein?

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

    What is the process by which a carbohydrate is covalently attached to a target macromolecule?

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

    Which type of proteins are only on one side of the membrane and 100% embed into a single face of the membrane?

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

    What type of proteins mediate cell adhesion and cell-cell communication, and keep cells together through cadherin to cadherin binding?

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

    Which protein is shown in an open inward conformation on the right?

    <p>GLUT1</p> Signup and view all the answers

    What kind of proteins are covalently bound to fatty acids or isoprenyl groups?

    <p>Lipid-anchored proteins</p> Signup and view all the answers

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