The Citric Acid Cycle Quiz
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Questions and Answers

What is another name for the citric acid cycle?

  • The Calvin cycle
  • The Krebs cycle (correct)
  • The Glycolysis cycle
  • The Lactic acid cycle

    • What type of molecules can be used to derive acetyl-CoA for the citric acid cycle?

  • Carbohydrates only
  • Lipids only
  • Nucleic acids only
  • Carbohydrates, fats, and proteins (correct)

    • What is the main purpose of the citric acid cycle in organisms?

  • To store energy in the form of glycogen
  • To synthesize proteins
  • To produce structural carbohydrates
  • To generate energy through respiration (correct)

    • What does the citric acid cycle provide as a precursor for certain biochemical pathways?

    <p>Certain amino acids</p> Signup and view all the answers

    What is the reducing agent produced by the citric acid cycle that is used in numerous other reactions?

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

    Study Notes

    Citric Acid Cycle

    • Another name for the citric acid cycle is the Krebs cycle or tricarboxylic acid (TCA) cycle.

    Sources of Acetyl-CoA

    • Various molecules can derive acetyl-CoA, including carbohydrates, fats, and proteins.
    • Glycolysis generates pyruvate from glucose, which is converted to acetyl-CoA before entering the cycle.
    • Fatty acid oxidation breaks down lipids to produce acetyl-CoA.
    • Certain amino acids can be deaminated to form compounds that enter the cycle as acetyl-CoA.

    Main Purpose

    • The primary function of the citric acid cycle is to generate energy through the oxidation of acetyl-CoA.
    • It produces ATP (or GTP), which serves as energy currency for cellular processes.

    Precursor for Biochemical Pathways

    • The citric acid cycle provides important precursors for biosynthetic pathways.
    • It supplies intermediates for the synthesis of amino acids, nucleotides, and other essential biomolecules.

    Reducing Agent

    • The citric acid cycle produces reducing agents like NADH and FADH2.
    • These compounds are crucial for the electron transport chain, contributing to ATP production in cellular respiration.

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    Description

    Test your knowledge of the citric acid cycle with this quiz. Explore the key concepts of energy release and acetyl-CoA oxidation in the Krebs cycle.

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