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Which organelle is known as the 'suicide bag' of the cell due to its digestive enzymes?
Mitochondria
Lysosome
Golgi apparatus
Ribosome
Lysosome
Lysosomes are membrane-bound organelles containing powerful hydrolytic enzymes that digest waste materials and foreign objects. When a cell is damaged beyond repair, these organelles burst, releasing enzymes that digest the entire cell, earning them the title 'suicide bags'.
Lysosomes are membrane-bound organelles containing powerful hydrolytic enzymes that digest waste materials and foreign objects. When a cell is damaged beyond repair, these organelles burst, releasing enzymes that digest the entire cell, earning them the title 'suicide bags'.
Think of a lysosome as a self-destruct mechanism in a spy movie; when the base (cell) is compromised, the device triggers to destroy all sensitive information (organelles) to prevent it from being used against the organization.
LYS-O-SOME: 'Lysis' (breaking) + 'Some' (body) = The body that breaks things down.
pH=тИТlog10тАЛ[H+] тАФ Represents the acidic environment maintained within the lysosome.
Lysosomes are filled with acid hydrolases that function optimally at a low pH (around 4.5тАУ5.0) maintained by proton pumps in their membrane. These enzymes catalyze the breakdown of biomolecules such as proteins, lipids, and nucleic acids through hydrolysis reactions: RтИТCOтИТNHтИТRтА▓+H2тАЛOтЖТRтИТCOOH+RтА▓тИТNH2тАЛ. When the lysosomal membrane ruptures, these enzymes are released into the cytoplasm where the higher pH (neutral) partially inhibits them, but in significant quantities, they degrade the cell's own components (autolysis).
Lysosomes are synthesized by the Golgi apparatus.
They are primarily found in animal cells; plant cells typically use the central vacuole for similar functions.
They play a crucial role in autophagy, where the cell removes its own worn-out components.
Deficiency in lysosomal enzymes leads to storage diseases like Tay-Sachs.
Efficient waste disposal system
Recycles raw materials for cellular metabolism
Defense mechanism against pathogens
Accidental rupture leads to autolysis (cell death)
Storage disorders if specific enzymes are missing
Cellular cleaning and housekeeping
Destruction of invading bacteria and viruses
Programmed cell death (apoptosis) in development
Lysosomes were discovered by the Belgian biologist Christian de Duve in 1949.
Option A (Mitochondria) is the 'Powerhouse of the cell'.
Option C (Golgi apparatus) is the 'Packaging and shipping center'.
Option D (Ribosome) is the 'Protein factory'.
B is correct тАФ Lysosomes act as the cellular digestive system and undergo autolysis when a cell is damaged.
In exams, always distinguish between 'Powerhouse' (Mitochondria), 'Suicide bag' (Lysosome), 'Protein factory' (Ribosome), and 'Packaging center' (Golgi) as these are high-frequency questions.
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