Biomolecules and Metabolism
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Questions and Answers

What is the primary role of catabolic processes?

  • Break down ATP to release energy for cellular work
  • Form NADH2 and FADH2 from acetyl CoA
  • Release energy from food and store it in ATP (correct)
  • Convert CO2 and water into acetyl CoA

    • In which stage of metabolism are amino acids, fatty acids, and glucose oxidized to a common metabolite?

  • Catabolism Stage III
  • Catabolism Stage II (correct)
  • Anabolism Stage I
  • Catabolism Stage I

    • What is the primary function of the citric acid cycle in metabolism?

  • Generate ATP directly from food molecules
  • Convert CO2 and water into energy
  • Form NADH2 and FADH2 from acetyl CoA
  • Oxidize acetyl CoA to CO2 and water (correct)

    • Why are metabolic pathways considered irreversible?

    <p>They are highly exergonic and have a defined direction</p> Signup and view all the answers

    Which molecule is the reduced form of FAD?

    <p>FADH2</p> Signup and view all the answers

    In which type of reaction does Y transfer a phosphoryl group to A—X to form Y—A + X?

    <p>Group Transfer Reaction</p> Signup and view all the answers

    What is the product of the isomerization reaction involving a-D-glucose?

    <p>G6P</p> Signup and view all the answers

    Which system plays a role in regulating metabolic pathways by permitting organisms to respond to changing conditions?

    <p>Endocrine system</p> Signup and view all the answers

    What is the key mechanism for regulating the metabolic flux of metabolites through a pathway?

    <p>Controlling the rate-limiting step, often the first committed step of the pathway</p> Signup and view all the answers

    How are most reactions in a metabolic pathway characterized?

    <p>Close to equilibrium and reversible</p> Signup and view all the answers

    In the context of metabolic pathways, what is ATP often compared to?

    <p>A wallet containing money</p> Signup and view all the answers

    What is the significance of compartmentation of metabolic processes in eukaryotic cells?

    <p>It allows for the utilization of specific cellular locations for different metabolic pathways</p> Signup and view all the answers

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