Lactate and Gluconeogenesis Quiz
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Questions and Answers

Which enzyme catalyzes the reduction of pyruvate to lactate during anaerobic glycolysis?

  • Pyruvate carboxylase
  • Glyceraldehyde 3 phosphate dehydrogenase
  • Lactate dehydrogenase (correct)
  • Lactate oxidase

    • What is the main source of carbon for gluconeogenesis?

  • Glyceraldehyde 3-phosphate
  • Glucose
  • Pyruvate
  • Lactate (correct)

    • What is the function of lactate formation by the LDH-catalyzed reaction during anaerobic glycolysis?

  • To yield NADH and consume NAD+ (correct)
  • To release lactate into the bloodstream
  • To convert lactate to glucose
  • To reduce pyruvate to lactate

    • What is the fate of lactate after it is released into the bloodstream?

    <p>It is converted to glucose in the liver</p> Signup and view all the answers

    What is the role of NADH in lactate formation during anaerobic glycolysis?

    <p>It is consumed</p> Signup and view all the answers

    Which enzyme catalyzes the reaction of glycolysis that requires NAD+?

    <p>Glyceraldehyde 3 phosphate dehydrogenase</p> Signup and view all the answers

    What is the function of NAD+ in glycolysis?

    <p>To consume NADH</p> Signup and view all the answers

    What is the function of lactate in the Cori cycle?

    <p>To provide carbon for gluconeogenesis</p> Signup and view all the answers

    What is the relationship between lactate and glucose in the Cori cycle?

    <p>Lactate is converted to glucose in the liver</p> Signup and view all the answers

    What is the role of LDH in the Cori cycle?

    <p>To convert pyruvate to lactate in the liver</p> Signup and view all the answers

    Which enzyme catalyzes the reduction of pyruvate to lactate during anaerobic glycolysis?

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

    What is the main source of carbon for gluconeogenesis?

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

    What is the function of lactate formation by the LDH-catalyzed reaction during anaerobic glycolysis?

    <p>To yield NADH and consume NAD+</p> Signup and view all the answers

    What is the fate of lactate after it is released into the bloodstream?

    <p>It is converted to glucose in the liver</p> Signup and view all the answers

    What is the role of NADH in lactate formation during anaerobic glycolysis?

    <p>It is produced</p> Signup and view all the answers

    Which enzyme catalyzes the reaction of glycolysis that requires NAD+?

    <p>Glyceraldehyde 3 phosphate dehydrogenase</p> Signup and view all the answers

    What is the function of NAD+ in glycolysis?

    <p>To consume NADH</p> Signup and view all the answers

    What is the function of lactate in the Cori cycle?

    <p>To provide carbon for gluconeogenesis</p> Signup and view all the answers

    What is the relationship between lactate and glucose in the Cori cycle?

    <p>Lactate is converted to glucose in the liver</p> Signup and view all the answers

    What is the role of LDH in the Cori cycle?

    <p>To convert pyruvate to lactate in the liver</p> Signup and view all the answers

    Which enzyme catalyzes the reduction of pyruvate to lactate during anaerobic glycolysis?

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

    What is the main source of carbon for gluconeogenesis?

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

    What is the product of the LDH-catalyzed reaction that is required for the GAPD-catalyzed reaction of glycolysis?

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

    Where is lactate released after it is formed during anaerobic glycolysis?

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

    What is the enzyme responsible for catalyzing the GAPD-catalyzed reaction of glycolysis?

    <p>Glyceraldehyde 3 phosphate dehydrogenase</p> Signup and view all the answers

    What is the fate of lactate after it is transported to the liver?

    <p>It is converted to glucose</p> Signup and view all the answers

    What is the role of NADH in the LDH-catalyzed reaction during anaerobic glycolysis?

    <p>It is oxidized to NAD+</p> Signup and view all the answers

    What is the function of lactate formation during anaerobic glycolysis?

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

    What is the enzyme responsible for converting lactate to glucose in the liver?

    <p>Glucose 6 phosphatase</p> Signup and view all the answers

    What is the function of the GAPD-catalyzed reaction of glycolysis?

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

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