Mitochondrion: Difference between revisions
imported>Thomas Simmons (New page: {{TOC-right}} Mitochondria (singular ''mitochondrion'') are the source of energy production within a cell. They are semiautonomous and self producing, residing in the cytoplasm of eukaryot...) |
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Mitochondria (singular ''mitochondrion'') are the source of energy production within a cell. They are semiautonomous and self producing, residing in the cytoplasm of eukaryotic cells. Converting cellular energy metabolites in the Kreb’s Cycle, through the process of oxidative phosphorylation | Mitochondria (singular ''mitochondrion'') are the source of energy production within a cell. They are semiautonomous and self producing, residing in the cytoplasm of '''eukaryotic cells'''. Converting cellular energy '''metabolites''' in the '''Kreb’s Cycle''', through the process of '''oxidative phosphorylation''' they produce '''adenosine triphosphate (ATP)''' which is used to power other processes in the cell.<ref>[http://mips.gsf.de/genre/proj/mfungd/About/glossary.html] Munich Information Center for Protein Synthesis</ref><ref name=NCBICell>[http://www.ncbi.nlm.nih.gov/About/primer/genetics_cell.html What is a cell?] National Center for Biotechnology Information, National Library of Medicine, National Insitutes of Health</ref><ref name=UTMedMitoStrx>[http://cellbio.utmb.edu/cellbio/mitochondria_1.htm#Substructure Mitochondrial substructure] Cell Biology Graduate Program, University of Texas Medical Branch</ref><ref name=JakubowskiATP>[http://employees.csbsju.edu/hjakubowski/classes/ch331/oxphos/olcouplingoxphos.html ATP and oxidative phosphorylation reactions] Jakubowski, Henry (2006) College of Saint Benedict, Saint John’s University</ref> | ||
Mitochondria are rod shaped<ref>Usually rod shaped. they may also be round.</ref> '''organelles''' <ref> a word derived from Greek meaning ''Little organ''</ref> with an inner and an outer membrane. The outer membrane limits the organelle. The inner membrane folds in on itself forming the '''''cristae mitochondriales''''', giving the appearance of partitions and chambers within the organelle in cross section.<ref>[http://cellbio.utmb.edu/cellbio/mitoch1.htm Mitochondria: Architecture dictates function] Cell Biology Graduate Program, University of Texas Medical Branch</ref> The cristae number and shape vary according to the type of tissue and organism. Cristae serve to increase the surface area of the inner membrane.<ref name=NCBICell/>. | Mitochondria are rod shaped<ref>Usually rod shaped. they may also be round.</ref> '''organelles''' <ref> a word derived from Greek meaning ''Little organ''</ref> with an inner and an outer membrane. The '''outer membrane''' limits the organelle. The '''inner membrane''' folds in on itself forming the '''''cristae mitochondriales''''', giving the appearance of partitions and chambers within the organelle in cross section.<ref>[http://cellbio.utmb.edu/cellbio/mitoch1.htm Mitochondria: Architecture dictates function] Cell Biology Graduate Program, University of Texas Medical Branch</ref> The cristae number and shape vary according to the type of tissue and organism. Cristae serve to increase the surface area of the inner membrane.<ref name=NCBICell/>. | ||
Mitochondria contain their own genome which is separate and distinct from the genome of the cell.<ref name=NCBICell/> Theoretically, mitochondria may have been separate unicellular organisms at one time and were subsumed in a symbiotic relationship into eukaryotic cells at some point in the evolutionary process. | Mitochondria contain their own '''genome''' which is separate and distinct from the genome of the cell.<ref name=NCBICell/> Theoretically, mitochondria may have been separate '''unicellular organisms''' at one time and were subsumed in a '''symbiotic relationship''' into eukaryotic cells at some point in the evolutionary process. | ||
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Revision as of 17:28, 13 January 2008
Template:TOC-right Mitochondria (singular mitochondrion) are the source of energy production within a cell. They are semiautonomous and self producing, residing in the cytoplasm of eukaryotic cells. Converting cellular energy metabolites in the Kreb’s Cycle, through the process of oxidative phosphorylation they produce adenosine triphosphate (ATP) which is used to power other processes in the cell.[1][2][3][4]
Mitochondria are rod shaped[5] organelles [6] with an inner and an outer membrane. The outer membrane limits the organelle. The inner membrane folds in on itself forming the cristae mitochondriales, giving the appearance of partitions and chambers within the organelle in cross section.[7] The cristae number and shape vary according to the type of tissue and organism. Cristae serve to increase the surface area of the inner membrane.[2].
Mitochondria contain their own genome which is separate and distinct from the genome of the cell.[2] Theoretically, mitochondria may have been separate unicellular organisms at one time and were subsumed in a symbiotic relationship into eukaryotic cells at some point in the evolutionary process.
Substructure
The two membranes are separated by space. The space enclosed within the inner memberane is the matrix, a moderately dense region with strands of DNA, ribosomes, or small granules. Using these tools, the mitochondria code for a portion of their own proteins. [3]
Notes
- ↑ [1] Munich Information Center for Protein Synthesis
- ↑ 2.0 2.1 2.2 What is a cell? National Center for Biotechnology Information, National Library of Medicine, National Insitutes of Health
- ↑ 3.0 3.1 Mitochondrial substructure Cell Biology Graduate Program, University of Texas Medical Branch
- ↑ ATP and oxidative phosphorylation reactions Jakubowski, Henry (2006) College of Saint Benedict, Saint John’s University
- ↑ Usually rod shaped. they may also be round.
- ↑ a word derived from Greek meaning Little organ
- ↑ Mitochondria: Architecture dictates function Cell Biology Graduate Program, University of Texas Medical Branch