Endosymbiotic Theory

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What is the Endosymbiotic Theory?

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The Endosymbiotic Theory proposes that eukaryotic cells originated through a symbiotic relationship between different species of prokaryotes, where one prokaryote engulfed another, leading to the development of organelles like mitochondria and chloroplasts.

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Why did cells with mitochondria-like organelles have an evolutionary advantage?

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They were able to make more use of available energy, allowing them to perform more complex functions and survive better in their environments.

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What evidence supports the Endosymbiotic Theory?

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Eukaryotic mitochondria and chloroplasts have their own circular DNA, similar to that of prokaryotes, suggesting they originated from free-living bacteria.

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What do both eukaryotic and prokaryotic cells have in common?

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Both eukaryotic and prokaryotic cells have ribosomes and cell membranes.

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What does the Theory of Endosymbiosis explain?

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The Theory of Endosymbiosis explains the origin of eukaryotic cells from prokaryotic ancestors.

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Name two organelles that arose from the Endosymbiotic Theory.

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Mitochondria and chloroplasts.

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What is the significance of circular DNA in mitochondria and chloroplasts?

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The presence of circular DNA in mitochondria and chloroplasts supports the idea that these organelles were once independent prokaryotic organisms.

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How do mitochondria contribute to cellular function?

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Mitochondria are known as the powerhouse of the cell, as they generate ATP through cellular respiration, providing energy for various cellular processes.

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What role do chloroplasts play in eukaryotic cells?

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Chloroplasts are responsible for photosynthesis, converting light energy into chemical energy stored in glucose.

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What is a prokaryote?

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A prokaryote is a single-celled organism that lacks a nucleus and membrane-bound organelles, such as bacteria.