Role of Oxygen in Respiration
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Questions and Answers

What is the primary role of oxygen in aerobic respiration?

  • To produce carbon dioxide
  • To produce carbon
  • To produce nitrogen
  • To aid in the conversion of glucose into energy (correct)

    • Which gas is produced in aerobic respiration?

  • Oxygen
  • Carbon
  • Carbon dioxide (correct)
  • Nitrogen

    • Which gas is required in aerobic respiration?

  • Oxygen (correct)
  • Nitrogen
  • Carbon
  • Carbon dioxide

    • What happens to glucose in the absence of oxygen during respiration?

    <p>It breaks down sugars to produce energy</p> Signup and view all the answers

    What are the major features associated with glycolysis, pyruvic oxidation, Krebs cycle, and electron transport chain?

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

    What is the main difference between aerobic and anaerobic respiration?

    <p>The requirement of oxygen</p> Signup and view all the answers

    What is the final electron acceptor for the electron transport chain in aerobic cellular respiration?

    <p>O2</p> Signup and view all the answers

    Which gas is needed to convert NADH to NAD in fermentation?

    <p>O2</p> Signup and view all the answers

    Which of the following is a product of alcohol fermentation?

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

    Which process uses yeast to produce wine?

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

    What is the final product of the electron transport chain in aerobic cellular respiration?

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

    Which molecule is regenerated when NADH or FADH2 send their high-energy electrons to the electron transport chain?

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

    Where does the electron transport chain take place in the cell?

    <p>Mitochondrial matrix</p> Signup and view all the answers

    What is the main purpose of running in place as mentioned in the additional context?

    <p>To reduce impact and stress on the body</p> Signup and view all the answers

    What is the significance of oxygen in aerobic cellular respiration?

    <p>It acts as the final electron acceptor.</p> Signup and view all the answers

    What happens if there is no NAD+ present to pick up electrons as the reactions continue?

    <p>The process stops, and glycolysis and citric acid cycle do not occur.</p> Signup and view all the answers

    What is the primary role of oxygen in aerobic respiration?

    <p>Facilitating the conversion of glucose into energy</p> Signup and view all the answers

    Which gas is needed to convert NADH to NAD in fermentation?

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

    What happens to glucose in the absence of oxygen during respiration?

    <p>It converts into lactic acid to produce energy</p> Signup and view all the answers

    What is the main purpose of running in place as mentioned in the additional context?

    <p>To increase the heart rate and oxygen intake for aerobic respiration</p> Signup and view all the answers

    Which process uses yeast to produce wine?

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

    What is the final product of the electron transport chain in aerobic cellular respiration?

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

    What is the final acceptor in the electron transport chain during aerobic cellular respiration?

    <p>O2</p> Signup and view all the answers

    Which molecule is needed to convert pyruvic acid to acetyl coenzyme A?

    <p>O2</p> Signup and view all the answers

    What gas is needed to convert NADH to NAD in fermentation?

    <p>O2</p> Signup and view all the answers

    Which of the following processes uses yeast to produce wine?

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

    What is the final product of alcohol fermentation?

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

    During aerobic cellular respiration, what happens if there is no NAD+ present to pick up electrons as the reactions continue?

    <p>Glycolysis and the citric acid cycle do not occur.</p> Signup and view all the answers

    What role does oxygen play in aerobic cellular respiration?

    <p>It serves as the final electron acceptor in the electron transport chain.</p> Signup and view all the answers

    Where does the electron transport chain take place in a cell during aerobic cellular respiration?

    <p>$H_2O$ production increases.</p> Signup and view all the answers

    What happens if aerobic respiration takes place?

    <p>$ATP$ is formed using energy from high-energy electrons.</p> Signup and view all the answers

    What gas is reduced to form water during aerobic cellular respiration?

    <p>O2</p> Signup and view all the answers

    Study Notes

    Aerobic Respiration

    • The primary role of oxygen in aerobic respiration is to act as the final electron acceptor, allowing the electron transport chain to generate ATP.
    • Oxygen is required for aerobic respiration to take place.
    • Carbon dioxide is the gas produced in aerobic respiration.

    Absence of Oxygen

    • In the absence of oxygen, glucose is converted to lactic acid or ethanol through fermentation.

    Features of Respiration Pathways

    • Glycolysis: occurs in the cytoplasm, breaks down glucose into pyruvate, and generates ATP and NADH.
    • Pyruvic oxidation: converts pyruvate into acetyl-CoA, producing NADH and CO2.
    • Krebs cycle: generates ATP, NADH, and FADH2 from acetyl-CoA.
    • Electron transport chain: generates ATP using electrons from NADH and FADH2.

    Aerobic vs Anaerobic Respiration

    • The main difference between aerobic and anaerobic respiration is the presence or absence of oxygen, respectively.

    Electron Transport Chain

    • The final electron acceptor for the electron transport chain is oxygen.
    • The final product of the electron transport chain is ATP.
    • The electron transport chain takes place in the mitochondria.

    Fermentation

    • Fermentation requires oxygen to convert NADH to NAD.
    • The final product of alcohol fermentation is ethanol and CO2.

    Other Key Facts

    • NAD+ is required to pick up electrons as the reactions continue in aerobic cellular respiration.
    • If there is no NAD+ present, the reactions will stop.
    • Running in place, as mentioned in the additional context, is an example of aerobic respiration taking place.
    • Oxygen is essential for generating ATP during aerobic cellular respiration.
    • Coenzyme A is needed to convert pyruvic acid to acetyl-CoA.

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    Test your knowledge about the role of oxygen in cellular respiration and the difference between aerobic and anaerobic respiration. Explore the process of converting glucose into energy with and without the presence of oxygen.

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