9. According to the Endosymbiotic Theory, the mitochondria of eukaryotes (such a
ID: 275208 • Letter: 9
Question
9. According to the Endosymbiotic Theory, the mitochondria of eukaryotes (such as a blue whale) are closely related to which of the following types of organism?
any photosynthetic bacterium
a nonphotosynthetic bacterium
a purple photosynthetic bacterium
10. What can be concluded from the phylogeny tree?
The phylogeny tree indicates that the domains of life are organized incorrectly.
The phylogeny tree indicates that bacteria are very diverse and should be reorganized to better reflect their similarity to eukaryotes.
The phylogeny tree indicates that cytochrome c oxidase (subunit 1) from a purple photosynthetic bacterium is closely related to cytochrome c oxidase (subunit 1) from eukaryotic mitochondria.
The phylogeny tree indicates that cytochrome c oxidase (subunit 1) from a photosynthetic bacterium is closely related to cytochrome c oxidase (subunit 1) from a nonphotosynthetic bacterium.
11. Does the phylogenetic tree support the Endosymbiotic Theory?
Yes
No
Explanation / Answer
Ans.9.
The mitochondria of eukaryotes are closely related to a PURPLE PHOTOSYNTHETIC BACTERIUM.
Based upon evidence of endsymbiotic theoory, Mitochondria are very similar to purple aerobic bacteria as they both use oxygen to produce ATP by Kreb's cycle and oxidative phosphorylation. Based upon the theory chloroplast is similar to photosynthetic bacteria as both have chlorophyll to capture light energy to produce chemical energy.
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