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Lecture 3: Anatomy of Eukaryotes and Endosymbiotic Theory

Endosymbiotic Theory

This theory was made by Lynn Margolis who suggested that mitochondria (with its own circular molecule of DNA) may have entered a eukaryotic cell to gain protection from the cell. The symbium, in this case, the mitochondria, also provides the host, in this case, the cell, energy.

Basically, whether you are a symbium(the intruder into the cell) or the host (the one being invaded) you both will gain something out of this fusion!

Serial Endosymbiotic Theory

States that the number of membrane increases for the endosymbiont. For example, when mitochondria, which has a phospholipid membrane before entering the cell host. After the mitochondria has entered the cell host, it now has 2 phospholipid membrane (because the host cell has a phospholipid membrane).

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