Why do organelles like mitochondria and chloroplasts have their own DNA?(1 point)
Responses
They are responsible for their own replication and division inside the cell.
They are responsible for their own replication and division inside the cell.
All organelles have their own DNA, and these two demonstrate that property.
All organelles have their own DNA, and these two demonstrate that property.
They used to be free-living prokaryotes that functioned as unicellular organisms.
They used to be free-living prokaryotes that functioned as unicellular organisms.
DNA is used to code for proteins, which these organelles synthesize.
DNA is used to code for proteins, which these organelles synthesize.
All of the above statements are valid points as to why organelles like mitochondria and chloroplasts have their own DNA.
1) They are responsible for their own replication and division inside the cell. This suggests that having their own DNA allows them to control their own replication process, independent of the host cell's DNA.
2) All organelles have their own DNA, and these two demonstrate that property. This statement highlights the fact that having their own DNA is a common characteristic of organelles, and mitochondria and chloroplasts are examples of this.
3) They used to be free-living prokaryotes that functioned as unicellular organisms. This explanation suggests that mitochondria and chloroplasts were once independent organisms with their own DNA, and through endosymbiosis, they became integrated into eukaryotic cells. They retained their own DNA as a remnant of their previous independence.
4) DNA is used to code for proteins, which these organelles synthesize. Having their own DNA allows mitochondria and chloroplasts to code for the proteins they need to function and carry out their specific roles within the cell.
pick one
If I were to pick one reason why organelles like mitochondria and chloroplasts have their own DNA, I would choose:
3) They used to be free-living prokaryotes that functioned as unicellular organisms.