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

What is the primary purpose of respiration in plants?

  • To reduce CO2 to form H2O
  • To store food
  • To break down glucose and obtain energy (correct)
  • To produce glucose

    • During which time period does respiration in plants occur?

  • Only during the day
  • Only during the early morning
  • Both at night and day (correct)
  • Only during the night

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

  • Fiber and cellulose
  • Minerals and vitamins
  • Proteins and lipids
  • Carbohydrates and sugars (correct)

    • Which of the following is NOT a principle soluble sugar in plant cells?

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

    What happens to the food during respiration in plant cells?

    <p>Food is broken down to produce energy</p> Signup and view all the answers

    What is a respiratory substrate in plants?

    <p>$Glucose$</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 substance rich in fat reserves is converted to sucrose and subsequently absorbed and respired by the growing embryo at germination?

    <p>Castor bean</p> Signup and view all the answers

    Which pathway involves the split of a 6-carbon glucose, forming 2 molecules of a 3-carbon compound, pyruvate?

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

    In which part of the cell does glycolysis occur?

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

    What is the end product of glycolysis?

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

    Which type of respiration occurs when there is not enough oxygen around for plants to respire?

    <p>Anaerobic respiration</p> Signup and view all the answers

    What is the total ATP produced from aerobic respiration?

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

    In which part of the cell does Krebs cycle occur?

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

    What occurs under either aerobic or anaerobic condition?

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

    What does NAD+ get reduced to during glycolysis?

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

    What is the primary purpose of respiration in plants?

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

    During which time period does respiration in plants occur?

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

    Which of the following is NOT a principle soluble sugar in plant cells?

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

    What does NAD+ get reduced to during glycolysis?

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

    What happens to the food during respiration in plant cells?

    <p>It is oxidized/combined with oxygen to release energy</p> Signup and view all the answers

    What is the end product of glycolysis?

    <p>$C_3H_6O_3$</p> Signup and view all the answers

    What is the end product of the Krebs Cycle in plant cells?

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

    During anaerobic respiration in plant cells, pyruvate can be converted to which compound?

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

    What is the main function of NADH in cellular respiration?

    <p>To generate ATP in the electron transport chain</p> Signup and view all the answers

    Which compound is formed when acetyl-CoA combines with oxaloacetate in the Krebs Cycle?

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

    What happens to fats rich in reserves contained in the endosperm tissue of certain seeds during germination?

    <p>They are converted to sucrose and absorbed by the growing embryo</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 primary function of the electron transport chain in cellular respiration?

    <p>To generate ATP from high-energy electrons</p> Signup and view all the answers

    In which part of the cell does the conversion of pyruvate to acetyl-CoA occur?

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

    What is the net production of ATP from glycolysis in plant cells?

    <p>2 ATP</p> Signup and view all the answers

    What is the role of oxygen in aerobic respiration in plant cells?

    <p>To accept electrons at the end of the electron transport chain</p> Signup and view all the answers

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