Lysosomes and Cell Function
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Questions and Answers

What is the chief function of lysosomes?

  • Releasing calcium ions into the blood
  • Ingesting bacteria, viruses, and toxins
  • Synthesizing new cell-building materials
  • Destroying all kinds of biomolecules including fats, carbohydrates, proteins, nucleic acids, and cellular debris (correct)
  • Where are the hydrolytic enzymes in lysosomes manufactured?

  • Cytoplasm
  • Endoplasmic reticulum (correct)
  • Endosomes
  • Golgi apparatus
  • What can excessive leakage from a large number of lysosomes result in?

  • Enhanced cell growth
  • Formation of new organelles
  • Cell destruction by auto-digestion (correct)
  • Increased cellular energy production
  • How is the pH of endosomes lowered to less than 6?

    <p>Active pumping of H ions into the interior</p> Signup and view all the answers

    What type of molecules do lysosomal acidic hydrolytic enzymes break down?

    <p>Carbohydrates and lipids</p> Signup and view all the answers

    Study Notes

    Lysosomes Function and Characteristics

    • Chief function of lysosomes is to break down waste materials and cellular debris through enzymatic digestion.
    • Hydrolytic enzymes within lysosomes are manufactured in the endoplasmic reticulum and processed through the Golgi apparatus.
    • Excessive leakage from a large number of lysosomes can lead to cellular damage or cell death, due to uncontrolled release of hydrolytic enzymes into the cytoplasm.
    • The pH of endosomes is lowered to less than 6 by the activity of proton pumps that transport hydrogen ions into the endosome.
    • Lysosomal acidic hydrolytic enzymes break down various types of biological macromolecules, including proteins, lipids, carbohydrates, and nucleic acids.

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    Description

    Test your knowledge about lysosomes, the single membranous organelles containing various digestive enzymes manufactured in the endoplasmic reticulum. Understand the role of lysosomes in maintaining cell equilibrium and the consequences of their excessive leakage.

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