Genetics and Genomics

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Endosymbiont Theory Evidence


The endosymbiont theory states that certain organelles of eukaryotes originated from a symbiosis formed between separate single-celled organelles.

Highlight all of the following statements that are CORRECT about supporting evidence for this theory.

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Mitochondria and chloroplasts divide by mitosis, similar to eukaryotic cells. Organelles such as mitochondria and chloroplasts have their own DNA and their own ribosomes. The ribosomes found in mitochondria and chloroplasts are more similar in size to prokaryotic ribosomes. Comparative ribosomal RNA sequencing demonstrates that both mitochondria and chloroplasts are related to bacteria. Mitochondria and chloroplasts control and synthesize 100% of the proteins they require to function. The inner membrane of mitochondria and chloroplasts are identical to that of the outer membrane of the organelle.