Krebs Cycle Quiz: Acetyl CoA, Citric Acid, and Cellular Location
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Questions and Answers

Where does the citric acid cycle occur within a eukaryotic cell?

  • The cytoplasm
  • Matrix of the mitochondrion (correct)
  • The cell membrane
  • The cristae of the mitochondrion
  • What oxidizing agent is used to temporarily store high energy electrons harvested from glucose molecules in a series of gradual steps in the cytoplasm?

  • FADH2
  • Oxygen
  • ADP
  • NAD+ (correct)
  • Which of the following is converted to a different organic molecule during fermentation?

  • Ethanol; reduced
  • Acetyl-CoA; reduced
  • Lactate; oxidized
  • Pyruvate; reduced (correct)
  • What happens to the oxygen that is used in cellular respiration?

    <p>It is reduced to form water</p> Signup and view all the answers

    Where does pyruvate oxidation occur in eukaryotic cells?

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

    What is the total amount of energy released during the Citric acid cycle?

    <p>2 ATP plus redox reactions have formed 6 NADH and 2 FADH2</p> Signup and view all the answers

    What is the direct use of the energy released as electrons move along the electron transport chain?

    <p>To transport protons against their concentration gradient across the inner mitochondrial membrane</p> Signup and view all the answers

    What is the oxidized form of the most common electron carrier needed for both glycolysis and the citric acid cycle?

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

    Why is the enzyme phosphofructokinase regulated by high levels of ATP?

    <p>To allow the substrate to be available for other reactions when the cell has ample energy</p> Signup and view all the answers

    In bacterial cell division, the process where the cell divides into two nearly equal halves is called:

    <p>Binary fission</p> Signup and view all the answers

    The DNA-wrapped histone structures that help fit the long DNA strands into the limited space of the nucleus are called:

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

    If there are 32 sister chromatids in a normal somatic cell, what is the haploid number for that cell?

    <p>16</p> Signup and view all the answers

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