Question

Which of the following statements does NOT provide evidence in support of the endosymbiotic origin of eukaryotic cells? a. The DNA sequence of mitochondria is similar to the DNA sequence of respiring bacteria. b. The DNA of chloroplasts is circular like the DNA of phototrophic bacteria. c. Mitochondria are capable of free-living outside of a eukaryotic cell. d. There is a lot of sequence homology between the DNA sequences of chloroplasts and phototrophic bacteria.

Answer 1

Mitochondria can't live independently out side the living cell.

That is why option C is correct. Such an evidence that the mitochondria can live out side is not there.

Other options are correct because there is similarity between DNA sequences of mitochondria, chloroplast and bacteria.

Answer 2

Option c. Mitochondria are capable of free-living outside of a eukaryotic cell does not provide evidence in support of the endosymbiotic origin of eukaryotic cells. The endosymbiotic theory proposes that mitochondria and chloroplasts originated from free-living prokaryotic cells that were engulfed by a host cell and developed a symbiotic relationship over time. Mitochondria are thought to have originated from aerobic bacteria, while chloroplasts are thought to have originated from photosynthetic bacteria. The other options provide evidence that supports the endosymbiotic theory, such as the similarity in DNA sequences between mitochondria/chloroplasts and their bacterial counterparts.