Metabolism: Krebs Cycle Summary Quiz
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Questions and Answers

Which location does the Krebs cycle occur in?

  • Cytosol
  • Endoplasmic reticulum
  • Mitochondrial membrane (correct)
  • Nucleus
  • What is the main source of ATP production in cells?

  • Photosynthesis
  • Beta-oxidation
  • Citric Acid Cycle (Krebs Cycle) (correct)
  • Glycolysis
  • In the Krebs cycle, how many molecules of CO2 are released per cycle?

  • 4
  • 3
  • 2 (correct)
  • 1
  • Which molecule is produced in the Krebs cycle when succinyl CoA is converted to succinate?

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

    When does decarboxylation occur in the citric acid cycle?

    <p>Conversion of alpha-ketoglutarate to succinyl CoA</p> Signup and view all the answers

    Which of the following is NOT a reactant in the Krebs cycle?

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

    What is the final step in cellular respiration?

    <p>Oxidative phosphorylation</p> Signup and view all the answers

    Which complex in the Electron Transport Chain is responsible for oxidizing Cytochrome c?

    <p>Complex 4- Cytochrome c oxidase</p> Signup and view all the answers

    Which molecules transfer their electrons near the beginning of the electron transport chain?

    <p>NADH and FADH2</p> Signup and view all the answers

    Where does oxidative phosphorylation occur?

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

    During cellular respiration, what happens to NADH and FADH2 after transferring electrons?

    <p>They are oxidized to NAD+ and FAD</p> Signup and view all the answers

    Which process makes use of electrons from electron carriers to develop a chemical gradient?

    <p>Electron Transport Chain</p> Signup and view all the answers

    What is the primary function of the eight enzymes involved in the citric acid cycle?

    <p>Convert acetyl-CoA into two molecules each of carbon dioxide and water</p> Signup and view all the answers

    Which enzyme is responsible for the conversion of isocitrate to α-ketoglutarate in the citric acid cycle?

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

    Which step in oxidative phosphorylation involves the splitting of oxygen to form water?

    <p>Splitting of Oxygen to form Water</p> Signup and view all the answers

    What is the main process by which energy is harnessed in oxidative phosphorylation?

    <p>Electron Transport Chain and Chemiosmosis</p> Signup and view all the answers

    Which of the following is NOT a step in the citric acid cycle?

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

    In oxidative phosphorylation, what is the function of chemiosmosis?

    <p>Pump protons through special channels to create ATP</p> Signup and view all the answers

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