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Question

Mitochondria and chloroplasts are suggested to have evolved from symbiotic prokaryotes present in primitive eukaryotic cells. One evidence for this is that:

A
These organelles contain cristae or thylakoids
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B
These organelles contain electron transport chain
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C
The genetic code in these organelles is same as in all organisms
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D
The ribosomes in these organelles share properties with those of prokaryotes
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Solution

The correct option is D The ribosomes in these organelles share properties with those of prokaryotes
  • Such Evidences are following
  • Mitochondria and chloroplasts are the same size as prokaryotic cells and divide by binary fission.
  • Mitochondria and chloroplasts have their own DNA which is circular, not linear.
  • Mitochondria and chloroplasts have their own ribosomes which have 30S and 50S subunits, not 40S and 60S.
  • So, the correct option is 'D

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