Fatty Acid Metabolism Enzymes and Carnitine Role Quiz
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Questions and Answers

What is the main function of fatty acids stored in adipose tissue?

  • Act as a structural component of cell membranes
  • Provide concentrated stores of metabolic energy (correct)
  • Control the body's response to insulin
  • Facilitate the transport of oxygen in the blood

    • Which step of β-oxidation involves the transfer of acyl CoA into mitochondria?

  • Transfer of acyl CoA into mitochondria by carnitine transport system (correct)
  • Activation of fatty acid to acyl-CoA
  • Reactions of β-oxidation in mitochondria
  • Oxidation of fatty acids at the β-carbon atom

    • What is the energy yield from the complete oxidation of fatty acids to CO2 and H2O?

  • 7 kcal/g fat
  • 9 kcal/g fat (correct)
  • 15 kcal/g fat
  • 12 kcal/g fat

    • What drives the reaction forward in the activation of fatty acids to their co-enzyme A (CoA) derivative?

    <p>Hydrolysis of PPi and synthesis of ATP</p> Signup and view all the answers

    Where does the β-oxidation pathway occur?

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

    Where does the beta oxidation of fatty acids take place?

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

    Which molecule is used as a transporter for the transfer of fatty acids across the inner mitochondrial membrane?

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

    Which enzyme transfers the fatty acyl group to the hydroxyl group of carnitine to form acyl carnitine?

    <p>Carnitine acyl transferase-I (CAT-I)</p> Signup and view all the answers

    How is carnitine synthesized in the body?

    <p>From lysine and methionine</p> Signup and view all the answers

    What is the final product after the successive removal of 2-carbon units in beta-oxidation of odd chain fatty acids?

    <p>Propionyl CoA</p> Signup and view all the answers

    What is the role of carnitine in the beta-oxidation of fatty acids?

    <p>Transferring the fatty acyl group to form acyl carnitine</p> Signup and view all the answers

    Which enzyme catalyzes the cleavage of beta-keto fatty acyl CoA, splitting off a molecule of acetyl CoA?

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

    What is the precursor for the synthesis of carnitine in the body?

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

    Which molecule is involved in the transfer of fatty acids across the inner mitochondrial membrane?

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

    What is the energy yield from the complete oxidation of fatty acids to CO2 and H2O?

    <p>9 kcal/g fat</p> Signup and view all the answers

    What is the final product after the successive removal of 2-carbon units in beta-oxidation of odd chain fatty acids?

    <p>Propionyl CoA</p> Signup and view all the answers

    In which organelle does the β-oxidation pathway occur?

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

    What drives the reaction forward in the activation of fatty acids to their co-enzyme A (CoA) derivative?

    <p>Energy from hydrolysis of PPi</p> Signup and view all the answers

    What is the function of carnitine in the transfer of acyl CoA into mitochondria?

    <p>Facilitate transfer across inner mitochondrial membrane</p> Signup and view all the answers

    What is the final product after the successive removal of 2-carbon units in beta-oxidation of fatty acids?

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

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