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 (B)</p> Signup and view all the answers

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

<p>Sucrose (D)</p> Signup and view all the answers

What happens to carbohydrates during respiratory metabolism?

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

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

<p>Fermentation (D)</p> Signup and view all the answers

What is the end product of glycolysis in plants?

<p>Pyruvate (A)</p> Signup and view all the answers

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

<p>Mitochondria (C)</p> Signup and view all the answers

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

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

Under which condition does fermentation occur in plant cells?

<p>In the absence of oxygen (D)</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 (A)</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 (C)</p> Signup and view all the answers

Where does glycolysis occur in plant cells?

<p>Cytosol (A)</p> Signup and view all the answers

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

<p>Sucrose (C)</p> Signup and view all the answers

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

<p>Glycolysis (C)</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 (C)</p> Signup and view all the answers

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

<p>Mitochondria (D)</p> Signup and view all the answers

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

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

When does respiration in plants occur?

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

What happens to carbohydrates during respiratory metabolism?

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

In which condition does fermentation occur in plant cells?

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

What is the end product of glycolysis in plant cells?

<p>Pyruvate (C)</p> Signup and view all the answers

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

<p>Glycolysis (A)</p> Signup and view all the answers

What are the waste products of respiration in plants?

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

Where does glycolysis occur in plant cells?

<p>Cytoplasm (D)</p> Signup and view all the answers

What is the role of oxygen in respiration?

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

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

<p>Sucrose (A)</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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