Do mitochondria and chloroplasts have 70s ribosomes?

70 s ribosomes are usually present in prokaryotes and eukaryotes have 80 s ribosomes with some exceptions like mitochondria and chloroplast. These organelles have similar structures like possessing 70 s ribosomes,dna ,rna. read more

Circular DNA and 70s ribosomes were the first clues that these organelles were evolved from prokaryotic cells. It is odd that parts of the cell have their own genome, but it was even more odd that their genomes had different characteristics. Eukaryotic cells have linear dna, and prokaryotic cells have circular dna like chloroplasts and mitochondria. read more

Best Answer: Mitochondria and chloroplast are supposed to have prokaryotic origin.You can think of them as endosymbiotic bacteria which became cell organelles during evolution. The endosymbiotic relationship of mitochondria with their host cells was popularized by Lynn Margulis. read more