Why do mitochondria and plastids have their own DNA unlike other organelles?
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Mitochondria and chloroplasts are the cell organelles which possess their own DNA which does not resemble the DNA of the nucleus. Mitochondria supply energy and chloroplasts trap sunlight to provide energy for the procee of photosynthesis. Hence these organelles should be more in number. Mitochondrial DNA and chloroplast DNA are identical to bacterial DNA and replicate by the process of binary fission.This process of replication by binary fission results in the formation of more number organelles in the same cell.
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