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

What is a respiratory substrate in plants?

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

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

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

In which part of the cell does glycolysis occur?

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

What is the end product of glycolysis?

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

What is the total ATP produced from aerobic respiration?

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

In which part of the cell does Krebs cycle occur?

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

What occurs under either aerobic or anaerobic condition?

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

What does NAD+ get reduced to during glycolysis?

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

During which time period does respiration in plants occur?

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

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

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

What does NAD+ get reduced to during glycolysis?

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

What is the end product of glycolysis?

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

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

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

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

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

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

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

Where does glycolysis occur in plant cells?

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

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

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

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

<p>2 ATP (C)</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 (D)</p> Signup and view all the answers

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