Metabolism and Energy Stages of Catabolism
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Metabolism and Energy Stages of Catabolism

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Questions and Answers

What is the main purpose of catabolic reactions in metabolism?

  • To break down large, complex molecules to provide energy and smaller molecules (correct)
  • To build larger molecules using ATP energy
  • To synthesize DNA and protein
  • To separate the contents of a cell from the external environment

    • Which stage of catabolism involves the oxidation of small molecules to produce ATP energy?

  • Stage 4: Polymerization
  • Stage 1: Digestion and Hydrolysis
  • Stage 2: Degradation
  • Stage 3: Oxidation (correct)

    • Where do metabolic reactions occur in eukaryotic cells?

  • Ribosome
  • Lysosome
  • Nucleus
  • Mitochondrion (correct)

    • What is the function of lysosomes in a cell?

    <p>Contain hydrolytic enzymes for digesting old cell structures</p> Signup and view all the answers

    Which component of a cell separates the cell's contents from the external environment?

    <p>Cell membrane</p> Signup and view all the answers

    What is the main function of the nucleus in a cell?

    <p>DNA replication and protein synthesis</p> Signup and view all the answers

    What is the main function of ATP in biological systems?

    <p>Facilitating energy transfer within cells</p> Signup and view all the answers

    Which component is NOT part of the ATP molecule?

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

    What happens to pyruvate under anaerobic conditions?

    <p>It is reduced to lactate</p> Signup and view all the answers

    Which process occurs when excess glucose needs to be stored in the body?

    <p>Glycogen synthesis</p> Signup and view all the answers

    What is the primary function of Coenzyme A (CoA) in metabolic pathways?

    <p>Carrying acyl groups for further metabolism</p> Signup and view all the answers

    When does gluconeogenesis tend to be more active?

    <p>During a low-carbohydrate diet</p> Signup and view all the answers

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