STU1043 Introduction to Plant Physiology LU5: Respiration in Plant 1 Quiz
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Questions and Answers

What are the waste products of respiration in plants?

  • Sucrose and fructose
  • Water and CO2 (correct)
  • Glucose and starch
  • Oxygen and glucose

    • When does respiration in plants occur?

  • Only during the night
  • Only during the day
  • At night and day (correct)
  • It varies from plant to plant

    • What are the principal respiratory substrates in cells of higher plants?

  • Vitamins
  • Carbohydrates (correct)
  • Lipids
  • Proteins

    • What is the role of oxygen in respiration?

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

    Which of the following is an example of a soluble sugar in plant cells?

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

    What happens to carbohydrates during respiratory metabolism?

    <p>They are partially or completely oxidized</p> Signup and view all the answers

    During which stage of respiration do succulent plants utilize organic acids as respiratory substrates?

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

    What is the end product of glycolysis in plants?

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

    In which organelle does the Krebs Cycle occur in plant cells?

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

    What is the total ATP produced from aerobic respiration in plant cells?

    <p>38 ATPs</p> Signup and view all the answers

    Under which condition does fermentation occur in plant cells?

    <p>In the absence of oxygen</p> Signup and view all the answers

    What is the role of organic acids like malic acid in succulent plants during the night?

    <p>Act as respiratory substrates</p> Signup and view all the answers

    What happens to pyruvate before it enters the Krebs Cycle in plant cells?

    <p>It is converted into acetyl-CoA</p> Signup and view all the answers

    Where does glycolysis occur in plant cells?

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

    What is the principle form in which organic materials are translocated within plants?

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

    Which process generates a net production of 2 ATP in plant cells?

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

    What is the primary function of respiration in plants?

    <p>To break down stored food and obtain energy</p> Signup and view all the answers

    In which organelle does the Krebs Cycle occur in plant cells?

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

    What are the most important respiratory substrates among carbohydrates in plant cells?

    <p>Sucrose and fructose</p> Signup and view all the answers

    When does respiration in plants occur?

    <p>Both at night and day</p> Signup and view all the answers

    What happens to carbohydrates during respiratory metabolism?

    <p>They are oxidized to CO2 and H2O</p> Signup and view all the answers

    Which stage of respiration involves the addition of acetyl-CoA to oxaloacetate to produce citrate, followed by a loss of CO2?

    <p>Krebs Cycle</p> Signup and view all the answers

    In which condition does fermentation occur in plant cells?

    <p>When oxygen is absent</p> Signup and view all the answers

    What is the end product of glycolysis in plant cells?

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

    Which process generates a net production of 2 ATP in plant cells?

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

    What are the waste products of respiration in plants?

    <p>Carbon dioxide and water</p> Signup and view all the answers

    Where does glycolysis occur in plant cells?

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

    What is the role of oxygen in respiration?

    <p>To produce energy</p> Signup and view all the answers

    Which of the following is an example of a soluble sugar in plant cells?

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

    When do succulent plants utilize organic acids as respiratory substrates?

    Signup and view all the answers

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