Fatty Acid Synthesis Overview
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Questions and Answers

What is the ratio of NADPH/NADP+ in the cytosol for fatty acid synthesis?

  • 3:1
  • 1:1
  • 4:1 (correct)
  • 2:1
  • Where does the transfer of acetyl groups occur from in the synthesis of fatty acids?

  • Mitochondria to Golgi apparatus
  • Lysosomes to cytosol
  • Endoplasmic reticulum to nucleus
  • Mitochondria to cytosol (correct)
  • What happens when the ratio of NADPH/NADP+ is high in cytosol for fatty acid synthesis?

  • Fatty acid synthesis is favored (correct)
  • Acetyl CoA production decreases
  • Fatty acid synthesis is inhibited
  • NADH levels increase
  • Which organelle is responsible for fatty acid synthesis in photosynthetic cells?

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

    What enzyme is inhibited by phosphorylation via AMP-activated protein kinase in the control of fatty acid synthesis?

    <p>Acetyl CoA carboxylase</p> Signup and view all the answers

    What is the fatty acid produced by the desaturation of stearic acid with a double bond between Carbons 9 and 10?

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

    What is the maximum point up to which mammals can add double bonds to carbon atoms in fatty acid chains?

    <p>C9 - C10</p> Signup and view all the answers

    What is the starting point for prostaglandin and leukotriene synthesis?

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

    Where does triacylglycerol synthesis occur?

    <p>Endoplasmic reticulum</p> Signup and view all the answers

    What supplies glycerol units for triacylglycerol synthesis?

    <p>Glucose metabolism</p> Signup and view all the answers

    What is the main phospholipid in cells?

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

    In relation to fat deposition as a result of a high carbohydrate diet, what is incorrect?

    <p>Triacylglycerol breakdown is high</p> Signup and view all the answers

    Where does fatty acid synthesis take place?

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

    What is the byproduct of the reaction catalyzed by acetyl CoA carboxylase?

    <p>H2CO3</p> Signup and view all the answers

    What is the function of the 'swinging arm' mechanism in fatty acid synthase?

    <p>To move the growing fatty acid chain between active sites</p> Signup and view all the answers

    What is the net result of the condensation reaction between acetyl-ACP and malonyl-ACP?

    <p>Formation of acetoacetyl-ACP</p> Signup and view all the answers

    What is the difference between fatty acid synthesis and oxidation?

    <p>Synthesis and oxidation involve different enzyme complexes</p> Signup and view all the answers

    How many enzyme activities are present in the mammalian fatty acid synthase?

    <p>7</p> Signup and view all the answers

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