The Citric Acid Cycle Quiz
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Questions and Answers

Which enzyme catalyzes the formation of Acetyl CoA from pyruvate in the Krebs cycle?

  • Pyruvate carboxylase
  • Pyruvate decarboxylase
  • Pyruvate dehydrogenase (correct)
  • Pyruvate kinase

    • How many reactions are there in the Krebs cycle?

  • 8
  • 7 (correct)
  • 6
  • 5

    • What is the overall energy yield of the Krebs cycle?

  • 4 ATP
  • 8 ATP
  • 6 ATP
  • 2 ATP (correct)

    • What is the main function of the tricarboxylic acid transporter?

    <p>Transport pyruvate into the mitochondria</p> Signup and view all the answers

    Which enzyme is responsible for the reduction of NAD+ to NADH in the Krebs cycle?

    <p>Malate dehydrogenase</p> Signup and view all the answers

    Which of the following is NOT a stage of glycolysis?

    <p>Pentose stage</p> Signup and view all the answers

    Which enzyme catalyzes the formation of Acetyl CoA from pyruvate in the Krebs cycle?

    <p>Pyruvate dehydrogenase</p> Signup and view all the answers

    What is the mode of action of each of the PDK and PDP?

    <p>PDK inhibits pyruvate dehydrogenase, while PDP activates it</p> Signup and view all the answers

    What is the importance of the tricarboxylic acid transporter?

    <p>It transports acetyl CoA into the mitochondria</p> Signup and view all the answers

    Which of the following is NOT a product of the Krebs cycle?

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

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