MAAP Biology I EOC Practice Questions - MAAP Biology I End-of-Course Assessment Exam

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Scientists compare mitochondria and chloroplasts with free-living prokaryotes to investigate their evolutionary origin. Which set of structural and genetic evidence best supports the Endosymbiotic Theory?

Both organelles contain linear chromosomes enclosed in a nuclear membrane and synthesize 80S eukaryotic ribosomes. Both organelles possess circular DNA, 70S prokaryotic-like ribosomes, and double membranes resulting from engulfment. Both organelles contain cell walls made of peptidoglycan and reproduce using spindle fibers during mitosis. Both organelles lack nucleic acids and depend entirely on nuclear DNA replication for organelle duplication.

Correct Answer:

Both organelles possess circular DNA, 70S prokaryotic-like ribosomes, and double membranes resulting from engulfment.

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