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Questions and Answers
What is the chief function of lysosomes?
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?
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?
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?
How is the pH of endosomes lowered to less than 6?
What type of molecules do lysosomal acidic hydrolytic enzymes break down?
What type of molecules do lysosomal acidic hydrolytic enzymes break down?
Flashcards
What is the primary function of lysosomes?
What is the primary function of lysosomes?
Lysosomes are organelles responsible for breaking down various biomolecules, including fats, sugars, proteins, and nucleic acids. They also digest cellular debris, essentially acting as the cell's recycling center.
Where are lysosomal enzymes made?
Where are lysosomal enzymes made?
Hydrolytic enzymes, essential for breaking down molecules within lysosomes, are produced by the endoplasmic reticulum, a network of membranes within the cell.
What happens if lysosomes leak excessively?
What happens if lysosomes leak excessively?
If too many lysosomes leak their contents, the cell can be destroyed by the release of their powerful digestive enzymes, leading to self-destruction.
How do endosomes become acidic?
How do endosomes become acidic?
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What do lysosomal enzymes break down?
What do lysosomal enzymes break down?
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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.
