Answer to Question #97113 in Cell Biology for Abhishek

Question

Describe the evolutionary origin of mitochondria .

Answer 1

In accordance with the theory of symbiogenesis, mitochondria appeared as a result of the capture of bacteria by primitive cells. Cells that could not use oxygen themselves to generate energy had severe developmental limitations; bacteria could do this. Mitochondrial ancestors were alpha-proteobacteria (in particular Rickettsiales or their close relatives).