Multiple Choice
What does the endosymbiotic theory propose about the origin of certain organelles in eukaryotic cells?
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5. Cell Components
Endosymbiotic Theory
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Which of the following organelles is the subject of the endosymbiotic theory?
A
Mitochondria
B
Ribosomes
C
Golgi apparatus
D
Lysosomes
Verified step by step guidance1
Understand the endosymbiotic theory: This theory suggests that certain organelles within eukaryotic cells originated as separate prokaryotic organisms that were taken inside a host cell.
Identify the key organelles involved: The endosymbiotic theory primarily involves mitochondria and chloroplasts, which are believed to have originated from free-living bacteria.
Consider the characteristics of mitochondria: Mitochondria have their own DNA, which is circular like bacterial DNA, and they replicate independently of the cell, similar to bacteria.
Compare with other organelles: Ribosomes, Golgi apparatus, and lysosomes do not have their own DNA and do not replicate independently, which makes them less likely candidates for the endosymbiotic theory.
Conclude that mitochondria are the organelles described by the endosymbiotic theory, as they share significant similarities with prokaryotic cells.
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