Metabolism of Lipid - Al-Hadi University Collage
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Questions and Answers

Which process involves breaking down large molecules into small particles to produce ATP?

  • Anabolism
  • Catabolism (correct)
  • Gluconeogenesis
  • Lipolysis
  • What hormone activates hormonesensitive triacylglycerol lipase (HSL) for hydrolyzing triglycerides?

  • Cortisol
  • Insulin
  • Glucagon
  • Epinephrine (correct)
  • In the metabolism of lipids, which pathway is quantitatively the most important for fatty acid oxidation?

  • α-Oxidation
  • ω-Oxidation
  • β-Oxidation (correct)
  • γ-Oxidation
  • Which molecule is converted to dihydroxyacetone phosphate (DHAP) for gluconeogenesis?

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

    What is the main function of lipolysis in the body's energy metabolism?

    <p>Energy production</p> Signup and view all the answers

    Which hormone does not directly influence human adipose tissue but activates hormonesensitive triacylglycerol lipase (HSL)?

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

    What is the initial event in the utilization of fat as an energy source?

    <p>Hydrolysis of triacylglycerol</p> Signup and view all the answers

    Which enzyme is responsible for converting fatty acids to CoA thioesters during activation?

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

    What is the role of hormone-sensitive triacylglycerol in fat metabolism?

    <p>Activate lipase enzyme</p> Signup and view all the answers

    Where does beta-oxidation, the degradation pathway of fatty acids, take place?

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

    What happens to free fatty acids once they bind to albumin in the plasma?

    <p>Transported to tissues</p> Signup and view all the answers

    Why is fatty acid oxidation not considered the simple reverse of fatty acid biosynthesis?

    <p>Different enzymes are involved</p> Signup and view all the answers

    What is the role of carnitine in fatty acid metabolism?

    <p>Transports fatty acids across the mitochondrial membrane</p> Signup and view all the answers

    Which enzyme is responsible for transferring the fatty acyl group to carnitine?

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

    What is the major pathway for the catabolism of saturated fatty acids?

    <p>β-oxidation</p> Signup and view all the answers

    Which compound results from the process of β-oxidation of fatty acids?

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

    What is the fate of each acetyl CoA molecule produced in fatty acid metabolism?

    <p>Oxidized by Krebs cycle to produce CO2, H2O, and ATP</p> Signup and view all the answers

    Which enzyme is responsible for the conversion of acyl-CoA to B-ketoacyl-CoA?

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

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