Multiple Choice
Which famous biologist is credited with the development of the endosymbiotic theory?
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5. Cell Components
Endosymbiotic Theory
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Which of the following can be cited as evidence for the theory of endosymbiosis?
A
Eukaryotic cells have a nucleus that contains linear DNA.
B
Prokaryotic cells lack membrane-bound organelles.
C
Eukaryotic cells can perform photosynthesis.
D
Mitochondria and chloroplasts have their own DNA similar to bacterial DNA.
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 genetic sequences, which is evidence for their prokaryotic origins.
Consider the presence of double membranes in mitochondria and chloroplasts: This feature is consistent with the engulfing mechanism proposed by the endosymbiotic theory, where the inner membrane would be the original bacterial membrane and the outer membrane derived from the host cell.
Evaluate the ability of mitochondria and chloroplasts to replicate independently within eukaryotic cells: This autonomous replication is another piece of evidence supporting their endosymbiotic origin, as it resembles the division process of bacteria.
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