Respiration in Plants: Mitochondrial Conversion and ATP Synthesis
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Questions and Answers

What is the purpose of the conversion of succinyl-CoA to succinic acid in the citric acid cycle?

  • To convert GDP to GTP in a coupled reaction
  • To reduce NAD+ to NADH + H+
  • To regenerate NAD+ from NADH
  • To synthesize GTP through substrate-level phosphorylation (correct)

    • Which molecule is reduced to FADH2 in the citric acid cycle?

  • NADH + H+
  • NAD+
  • FAD+ (correct)
  • FADH2

    • What is the final product synthesized when GTP is converted to GDP in the citric acid cycle?

  • NADH
  • ATP (correct)
  • ADP
  • FADH2

    • How many molecules of NADH + H+ are synthesized during the TCA cycle from one molecule of glucose?

    <p>8</p> Signup and view all the answers

    Which compound is the first member of the citric acid cycle that must be continuously replenished for the cycle to continue?

    <p>Oxaloacetic acid</p> Signup and view all the answers

    What is the fate of pyruvate under aerobic conditions?

    <p>Conversion to acetyl CoA</p> Signup and view all the answers

    During fermentation in plants, pyruvate is converted into which compound?

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

    Which molecule is NOT reduced during the citric acid cycle?

    <p>NAD+</p> Signup and view all the answers

    How many molecules of ATP are synthesized from one molecule of glucose in glycolysis and the TCA cycle combined?

    <p>8</p> Signup and view all the answers

    What happens during substrate-level phosphorylation in the citric acid cycle?

    <p>GDP is phosphorylated to form GTP.</p> Signup and view all the answers

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