Making Lipids
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Questions and Answers

What is the function of phospholipids in cells?

  • Assist in protein synthesis
  • Make membranes (correct)
  • Store energy
  • Assist in fat metabolism

    • Where is TAG (triacylglycerol) made in the cell?

  • Smooth ER (correct)
  • Rough ER
  • Golgi apparatus
  • Mitochondria

    • What is the function of seipin in lipid droplet formation?

  • Facilitates protein synthesis
  • Aids in DNA replication
  • Regulates cell division
  • Assists budding from ER lipids (correct)

    • What type of ER is associated with the accumulation of TAG?

    <p>Smooth ER</p> Signup and view all the answers

    What is the function of perilipins?

    <p>Coating lipid droplets</p> Signup and view all the answers

    Where does triacylglycerol synthesis occur?

    <p>Smooth ER bilayer</p> Signup and view all the answers

    What is the role of seipin in lipid droplet biogenesis?

    <p>Facilitating the growth of nascent lipid droplets</p> Signup and view all the answers

    What is the definition of amphipathic?

    <p>Having both hydrophilic and hydrophobic parts</p> Signup and view all the answers

    Where are enzymes metabolizing phospholipids located?

    <p>All membranes except the cytosol</p> Signup and view all the answers

    What is the function of phosphatidylinositol 4,5-bisphosphate (PIP2) at the cell membrane?

    <p>Regulate cellular functions</p> Signup and view all the answers

    Where are seipins and perilipins involved in the cell?

    <p>Lipid droplets</p> Signup and view all the answers

    What is the starting point for phospholipids?

    <p>Phosphatidic acid</p> Signup and view all the answers

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