Endosymbiotic Theory Review

The theory of Endosymbiosis explains

• The origin of eukaryotes

• How bacteria live

• How species develop

• Why cells rely on one another

____________ & _________________ are organelles that definitely arose from endosymbiosis.

• Nucleus and cell membrane

• Chloroplast and mitochondria

• Mitochondria and nucleus

• Cell wall and chloroplast

The endosymbiotic theory states that a prokaryotic cell...

• grew out of an aerobic prokaryotic cell

• engulfed an aerobic bacteria and photosynthetic bacteria

• grew out of a photosynthetic prokaryotic cell

• digested an aerobic bacteria and photosynthetic bacteria

Which of the following characteristics make mitochondria and chloroplasts different from other organelles?

• They are much bigger

• The are found in both prokaryotic and eukaryotic cells.

• They both make ATP

• They were once free-living prokaryotes

Mitochondria and Chloroplasts have their own DNA which means they can divide themselves. True or False?

• True

• False

Compare and contrast scientific explanations for cellular complexity in prokaryotic and eukaryotic cells.

• Both types of cells are explained by the endosymbiotic theory.

• Prokaryotic cells are explained by the endosymbiotic theory, while eukaryotic cells are not.

• Eukaryotic cells are explained by the endosymbiotic theory, while prokaryotic cells are not.

• Neither type of cell is explained by the endosymbiotic theory.

Which organelle is believed to have originated from an ancient symbiotic relationship between a host cell and a photosynthetic bacterium?

• Nucleus

• Chloroplast

• Ribosome

• Endoplasmic Reticulum

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What evidence supports the endosymbiotic theory regarding mitochondria?

• Mitochondria have a double membrane structure.

• Mitochondria are found in all prokaryotic cells.

• Mitochondria can perform photosynthesis.

• Mitochondria are larger than most organelles.

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Which of the following is NOT a characteristic of mitochondria that supports the endosymbiotic theory?

• They have their own DNA.

• They can replicate independently of the cell.

• They are involved in protein synthesis.

• They have a double membrane.

The endosymbiotic theory suggests that mitochondria and chloroplasts were once free-living...

• Viruses

• Bacteria

• Fungi

• Algae

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