The Citric Acid Cycle Quiz
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Questions and Answers

What is the molecule that initiates the Citric acid cycle in the mitochondria?

  • Lactic acid
  • Glucose
  • Acetyl-CoA (correct)
  • Pyruvate
  • Where does the Citric acid cycle take place?

  • Endoplasmic reticulum
  • Cytoplasm
  • Mitochondrial matrix (correct)
  • Nucleus
  • How many ATP molecules are produced for every acetyl-CoA molecule that enters the Citric acid cycle?

  • 1 ATP (correct)
  • 4 ATP
  • 2 ATP
  • 3 ATP
  • What are the low-energy state sensors that activate the Citric acid cycle?

    <p>ADP and NAD+</p> Signup and view all the answers

    Study Notes

    Citric Acid Cycle Overview

    • The molecule that initiates the Citric Acid Cycle is Acetyl-CoA, derived from carbohydrates, fats, and proteins.
    • The Citric Acid Cycle occurs in the mitochondria, specifically in the mitochondrial matrix, which is the innermost compartment of the mitochondria.

    Energy Production

    • For each Acetyl-CoA molecule that enters the Citric Acid Cycle, a net yield of 10 ATP molecules is produced through the cycle and associated electron transport chain processes.

    Regulatory Mechanisms

    • Low-energy state sensors that activate the Citric Acid Cycle include ADP (adenosine diphosphate), AMP (adenosine monophosphate), and calcium ions. These signals indicate a need for energy production, stimulating the cycle's activity.

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    Description

    Test your knowledge of cellular respiration with this quiz on the citric acid cycle. Explore the multistep process of converting acetyl-CoA from various nutrients into CO2 and NADH in the mitochondria.

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