Multiple Choice
Which statement best describes the possible origins of cell organelles in eukaryotes according to the endosymbiotic theory?
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5. Cell Components
Endosymbiotic Theory
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Which of the following statements supports the theory of endosymbiosis?
A
Eukaryotic cells divide by mitosis and meiosis.
B
Mitochondria and chloroplasts have their own DNA similar to bacterial DNA.
C
Prokaryotic cells lack membrane-bound organelles.
D
Eukaryotic cells have a nucleus that contains the cell's genetic material.
Verified step by step guidance1
Understand the theory of endosymbiosis: It suggests that certain organelles, like mitochondria and chloroplasts, originated as free-living bacteria that were engulfed by ancestral eukaryotic cells.
Identify key characteristics of mitochondria and chloroplasts: These organelles have their own DNA, which is circular and similar to bacterial DNA, supporting the idea that they were once independent prokaryotic organisms.
Compare the DNA of mitochondria and chloroplasts to bacterial DNA: Both have similar structures and replication processes, which is evidence for their prokaryotic origins.
Consider the implications of organelles having their own DNA: This suggests that these organelles can replicate independently within the cell, a trait inherited from their bacterial ancestors.
Evaluate the statement: 'Mitochondria and chloroplasts have their own DNA similar to bacterial DNA' as it directly supports the theory of endosymbiosis by highlighting the similarities between these organelles and bacteria.
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