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 (B)</p> Signup and view all the answers

What is the function of perilipins?

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

Where does triacylglycerol synthesis occur?

<p>Smooth ER bilayer (A)</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 (B)</p> Signup and view all the answers

What is the definition of amphipathic?

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

Where are enzymes metabolizing phospholipids located?

<p>All membranes except the cytosol (B)</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 (C)</p> Signup and view all the answers

Where are seipins and perilipins involved in the cell?

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

What is the starting point for phospholipids?

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

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