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

Where does the β-oxidation pathway occur?

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

Where does the beta oxidation of fatty acids take place?

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

How is carnitine synthesized in the body?

<p>From lysine and methionine (C)</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 (B)</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 (C)</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 (B)</p> Signup and view all the answers

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

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

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

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

In which organelle does the β-oxidation pathway occur?

<p>Mitochondria (C)</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 (D)</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 (A)</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 (B)</p> Signup and view all the answers

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