Cellular Respiration and Glucose Regulation
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Cellular Respiration and Glucose Regulation

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Questions and Answers

What is the net energy yield from the conversion of one glucose molecule to two pyruvate molecules in glycolysis?

  • 30.5 kJ/mol
  • 147.4 kJ/mol
  • 36.7 kJ/mol
  • 73.4 kJ/mol (correct)

    • What is the role of thiaminepyrophosphate (TPP) in alcoholic fermentation?

  • Cofactor for alcohol dehydrogenase
  • Cofactor for pyruvate decarboxylase (correct)
  • Cofactor for pyruvate kinase
  • Cofactor for lactate dehydrogenase

    • Which enzyme catalyzes the conversion of pyruvate to lactate in anaerobic conditions?

  • Alcohol dehydrogenase
  • Lactate dehydrogenase (correct)
  • Pyruvate kinase
  • Pyruvate decarboxylase

    • Which control point in glycolysis is associated with a -30.5 kJ/mol decrease in free energy?

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

    What is the subunit composition of lactate dehydrogenase in heart muscle?

    <p>H4</p> Signup and view all the answers

    How many ATP molecules are produced per glucose molecule in glycolysis?

    <p>2</p> Signup and view all the answers

    What is the purpose of the reduction of pyruvate to lactate in anaerobic conditions?

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

    Which reaction in glycolysis has a particularly large decrease in free energy?

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

    What is the function of pyruvate kinase in glycolysis?

    <p>To catalyze the conversion of phosphoenolpyruvate to pyruvate</p> Signup and view all the answers

    Which reaction is associated with a decrease in free energy of -30.5 kJ/mol?

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

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