Endosymbiotic theory

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(Evolutionary Biology) The theory that cellular organelles such as mitochondria and chloroplasts in eukaryotic cells are produced by early endogenous symbiosis between prokaryotic symbiont organisms and eukaryotic host cells.

The theory of symbiosis symbiosis is the theory of evolution, assuming that internal symbiosis between prokaryotic and eukaryotic host cells is a means of mitochondria and chloroplast in eukaryotic cells. Supporters of theory believe that larger cells will ingest smaller free cells after about 5 billion years. - Prokaryotes (bacteria) and intracellular prokaryotes exist as symbiotic organisms. The results supporting this theory seems to suggest that mitochondria are derived from proteobacteria (such as SAR 11 clade) 2, while chloroplasts are derived from cyanobacteria (especially nitrogen-fixing cyanobacteria) 3 . Other evidence that seems to support this theory are as follows:

Mitochondria and plastids can regenerate themselves by a process similar to that of prokaryotic division

Mitochondria and plastids have a single loop DNA similar in size and structure but different from nucleus

The mitochondria and chloroplast envelope porin are similar to the bacterial cell membrane porin. Cardiolipin is a membrane lipid found only in bacterial cell membranes and mitochondrial inner membranes.

One internal symbiosis (unknown) Collins English dictionary - a complete and complete 10th edition. From Dictionary.com [1]

2 "Mitochondria shares an ancestor with SAR 11, an important marine microorganism worldwide." (2011). Obtained from ScienceDaily [http://www.sciencedaily.com/releases/2011/07/110725190046.htm]

3 Deusch, O. ; Etc etc (2008). "The gene of the cyanobacterial gene in the plant nuclear genome points to the plastid ancestor that forms heteromorphic cells" Moore Biology Evol 25: 748-761

The theory of symbiosis symbiosis is a unified widely accepted theory about how organelles are produced in living organisms different from eukaryotes. In the theory of internal symbiosis, consistent with the general theory of evolution, all creatures come from a common ancestor. Such ancestry may be similar to bacteria or prokaryotes in which single-stranded DNA is surrounded by the plasma membrane. Over time, the morphology and function of these bacteria have differentiated. Some bacteria acquire the ability to process energy from the environment in a novel way. Photosynthetic bacteria have developed a route to produce sugar from sunlight. Other organisms developed a new way to use this sugar, which is oxidative phosphorylation. And it produces ATP and oxygen from glycolysis. You can then use ATP to supply energy to other reactions within the cell.

Internal symbiotic theory involves the origins of mitochondria and chloroplasts, which have bacterial characteristics. Mitochondria and chloroplasts are thought to develop by symbiotic bacteria, especially alpha-proteobacteria and cyanobacteria, respectively. This theory shows that prokaryotic cells are consumed or swallowed by larger cells. Prokaryotic organelles are not consumed for unknown reasons. This lack of consumption will lead to symbiosis of the two cells, thereby obtaining mutually beneficial benefits. As time goes by, the new combination of organelles evolves into complex eukaryotic cells of the day. Internal symmetry theory has been widely accepted as one of the possibilities of mitochondrial, chloroplast and other eukaryotic organelle and cellular origins.