Pyruvate Dehydrogenase Complex Quiz
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Questions and Answers

What is the function of the Pyruvate dehydrogenase complex in the mitochondrial matrix?

  • Synthesize pyruvate from acetyl-CoA
  • Transfer pyruvate to acetyl-CoA (correct)
  • Convert acetyl-CoA to pyruvate
  • Oxidize acetyl-CoA to water and CO2
  • Which statement accurately describes the TCA cycle (Krebs cycle)?

  • It synthesizes acetyl-CoA from pyruvate.
  • It takes place in the cytoplasm.
  • The last electron acceptor is NADH.
  • Organic substrates are completely degraded to CO2 & H2O. (correct)
  • Which coenzyme is involved in the oxidative decarboxylation reaction that converts pyruvate to acetyl-CoA?

  • ATP
  • NADH (correct)
  • NAD+
  • FADH2
  • What is the role of H+ in the process of carrying pyruvate to the mitochondrial matrix?

    <p>It neutralizes the negative charge of pyruvate.</p> Signup and view all the answers

    In aerobic respiration, what is kept in the form of ATP?

    <p>Energy released from organic substrates</p> Signup and view all the answers

    Which of the following is true about the Oxidation of Pyruvate to Acetyl-CoA reaction?

    <p>It creates 1 CO2 and NADH.</p> Signup and view all the answers

    Which enzyme is responsible for performing the conversion of pyruvate to acetyl-CoA in the mitochondrial matrix?

    <p>(PDH) Pyruvate Dehydrogenase Complex</p> Signup and view all the answers

    What does the Pyruvate dehydrogenase complex consist of?

    <p>(Three enzymes connected non-covalently) Proteins</p> Signup and view all the answers

    What is the role of molecular O2 in aerobic respiration?

    <p>It is the last electron acceptor.</p> Signup and view all the answers

    Where does the TCA cycle (Krebs cycle) take place?

    <p>In the mitochondrial matrix.</p> Signup and view all the answers

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