Chapter 3 Quiz 1 (2nd Secondary Biology)

63 Questions | Total Attempts: 15

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Chapter 3 Quiz 1 (2nd Secondary Biology)

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Questions and Answers
  • 1. 
    The figure below is of a cell with one mitochondrion. Where does each of the following reaction occur inside the cell?Production of pyruvic acid / Oxidation of pyruvic acid / Transfer of electrons from electron donors to electron acceptors.
    • A. 

      Production of pyruvate in (1) / Oxidation of pyruvate in (2) / Transfer of electrons in (3)

    • B. 

      Production of pyruvate in (3) / Oxidation of pyruvate in (2) / Transfer of electrons in (4)

    • C. 

      Production of pyruvate in (2) / Oxidation of pyruvate in (1) / Transfer of electrons in (4)

    • D. 

      Production of pyruvate in (1) / Oxidation of pyruvate in (4) / Transfer of electrons in (3)

  • 2. 
    Which of the following correctly explain the function a mitochondrion?
    • A. 

    • B. 

    • C. 

      C

    • D. 

      D

  • 3. 
    The equation in the figure below is called ....
    • A. 

      Oxidative phosphorylation

    • B. 

      Oxidative decarboxylation

    • C. 

      Pyruvate production

    • D. 

      Pyruvate reduction

  • 4. 
    Oxygen is needed in the Electron Transport System to……..
    • A. 

      Prevent a pile-up (accumulation) of hydrogen ions

    • B. 

      Prevent a pile-up of NAD+

    • C. 

      Act as a final electron acceptor that helps to move electrons down a chain for the production of ATP

    • D. 

      Oxidize glucose molecules

  • 5. 
    Each NADH entering the Electron Transport System from Krebs cycle produces…..
    • A. 

      1 ATP

    • B. 

      2 ATP

    • C. 

      3 ATP

    • D. 

      ATP

  • 6. 
    Each FADH2 entering the Electron Transport system from Kreb's cycle produces…..
    • A. 

      1 ATP

    • B. 

      2 ATP

    • C. 

      3 ATP

    • D. 

      4 ATP

  • 7. 
    Which of the following molecules will diffuse out of the cell, enter the bloodstream, and be released from the lungs during aerobic cellular respiration?
    • A. 

      Oxygen

    • B. 

      Carbon dioxide

    • C. 

      ATP

    • D. 

      Glucose

  • 8. 
    During aerobic cellular respiration, which molecule originates from the digestive system?
    • A. 

      Oxygen

    • B. 

      ATP

    • C. 

      Water

    • D. 

      Glucose

  • 9. 
    Cytochromes are located …..
    • A. 

      Within the cytoplasm of a cell

    • B. 

      On the cristae of mitochondria

    • C. 

      Within the matrix of mitochondria

    • D. 

      Within the stroma of chloroplasts

  • 10. 
    Which of the following statements about aerobic cellular respiration in the human body is NOT correct?
    • A. 

      Glucose and oxygen are delivered to the cells by the bloodstream.

    • B. 

      Carbon dioxide and water are removed from the cells by the bloodstream.

    • C. 

      ATP remains in the cytoplasm as a source of energy for the cell to do work.

    • D. 

      In mitochondria, glucose is broken down where carbon dioxide, water as well as ATP are produced.

  • 11. 
    Which of the following statements is correct?
    • A. 

      NAD is reduced and becomes NADH2 when it accepts hydrogen atoms.

    • B. 

      NAD is oxidized and becomes NADH when it accepts hydrogen atoms.

    • C. 

      NAD is reduced and becomes NADH2 when it releases hydrogen atoms.

    • D. 

      NADH2 is reduced to NAD when the hydrogen atoms are passed to another acceptor.

  • 12. 
    Which of the following statements is NOT true about NAD+?
    • A. 

      NAD+ can only be used once before it must be resynthesized.

    • B. 

      NAD+ can accept hydrogen atoms and is reduced to NADH2.

    • C. 

      NADH2 can carry the hydrogen atoms to another acceptor, becoming oxidized to NAD+ again.

    • D. 

      NAD+ is involved in cellular respiration.

  • 13. 
    Which of the following statements is NOT correct about glycolysis?
    • A. 

      Glycolysis takes place within the cytoplasm.

    • B. 

      Glycolysis uses two ATP but forms four ATP, resulting in a net gain of two ATP molecules.

    • C. 

      During glycolysis, two molecules of NAD+ are reduced to form 2NADH + 2H+

    • D. 

      Glycolysis begins with a glucose molecule and ends with four pyruvate molecules.

  • 14. 
    How many times does the Krebs cycle turn per glucose molecule?
    • A. 

      Once

    • B. 

      Twice

    • C. 

      Three times

    • D. 

      Four times

  • 15. 
    Which of the following molecules is NOT formed as a result of the Krebs cycle during aerobic cellular respiration?
    • A. 

      NADH

    • B. 

      ATP

    • C. 

      ADP

    • D. 

      FADH2

  • 16. 
    Which molecule will combine with the four-carbon oxaloacetate in the Krebs cycle to form the six-carbon citrate?
    • A. 

      Lactic acid

    • B. 

      NADH

    • C. 

      FADH2

    • D. 

      Acetyl-CoA

  • 17. 
    Which molecule is the final acceptor of electrons at the end of the electron transport system in aerobic cellular respiration?
    • A. 

      Oxygen

    • B. 

      Carbon dioxide

    • C. 

      Lactic acid

    • D. 

      Citric acid

  • 18. 
    Which of the following overall equations represents aerobic cellular respiration?
    • A. 

      C6H12O6 -----> 2 pyruvic acids + 2 ATP

    • B. 

      6 CO2 + 6 H2O + energy -----> C6H12O6 + 6 O2

    • C. 

      C6H12O6 + 6 O2 -----> 6 CO2 + 6 H2O + energy

    • D. 

      C6H12O6 -----> 2 lactic acid + 2 ATP

  • 19. 
    Which of the following pathways and reactions will result in the production of the most ATP molecules during aerobic cellular respiration of one glucose molecule?
    • A. 

      Glycolysis

    • B. 

      Krebs cycle

    • C. 

      Electron transport system

    • D. 

      Fermentation

  • 20. 
    Which of the following overall equations represents fermentation that occurs in yeast cells?
    • A. 

      C6H12O6 -----> 2 pyruvic acid + 2 ATP

    • B. 

      C6H12O6 + 6 O2 -----> 6 CO2 + 6 H2O + energy

    • C. 

      C6H12O6 -----> 2 lactic acid + 2 ATP

    • D. 

      C6H12O6 -----> 2ethyl alcohol + 2 CO2 + 2 ATP

  • 21. 
    ______ is a series of enzymatic reactions by which glucose is incompletely metabolized to lactate or carbon dioxide and alcohol.
    • A. 

      Fermentation

    • B. 

      The Krebs cycle

    • C. 

      The electron transport system

    • D. 

      Glycolysis

  • 22. 
    When oxygen is NOT available to an animal cell, which of the following statements is correct?
    • A. 

      Only the electron transport system remains operative.

    • B. 

      More hydrogen gas is produced because oxygen, the final acceptor, is not present.

    • C. 

      The cells production of ATP molecules is cut.

    • D. 

      Glycolysis still occurs because NADH2 passes its hydrogen atoms to pyruvate.

  • 23. 
    Out of 38 molecules of ATP produced by respiration of one glucose molecule, the number of ATP molecules produced from NADH2 are …..
    • A. 

      22 ATP

    • B. 

      36 ATP

    • C. 

      30 ATP

    • D. 

      34 ATP

  • 24. 
    Out of 38 molecules of ATP produced by respiration of one glucose molecule, the number of ATP molecules produced from FADH2 are …..
    • A. 

      4 ATP

    • B. 

      8 ATP

    • C. 

      20 ATP

    • D. 

      22ATP

  • 25. 
    Inner membrane of mitochondria folds inwards, ….
    • A. 

      Forming the cristae.

    • B. 

      Increasing the metabolic and energy-producing activities of mitochondria.

    • C. 

      Allowing a greater amount of membrane to be packed into the mitochondrion.

    • D. 

      All of them.