Mon Prof Augmenté
Bacteria Inside Cells
Age 17 · Biology
Mitochondria and chloroplasts are organelles in eukaryotic cells that carry their own circular DNA and a double membrane. They descend from bacteria that were taken into ancestral host cells and kept alive inside them.
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In the picture
- A rod-shaped bacterium touching the outer membrane of a larger cell
- A round nucleus inside the larger cell
- A bean-shaped mitochondrion with two boundary lines and a circular DNA loop
- A green chloroplast with two boundary lines and a circular DNA loop
Examples
- Mitochondria in muscle cells that release energy for movement
- Chloroplasts in spinach leaves that make the leaf green
Key takeaways
- Mitochondria and chloroplasts have their own circular DNA and a double membrane.
- They descend from bacteria taken into ancestral host cells.
Quiz: Bacteria Inside Cells (Age 17)
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According to the card, what two features do mitochondria and chloroplasts have?
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Which organelles does the card say descend from bacteria taken into ancestral host cells?
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According to the card, what happened to the bacteria taken into ancestral host cells?
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