The Molecular Biology Notebook Online
Mitochondrion
An organelle in eukaryotic cells which is responsible for the oxidation of energy-rich substances. They are oval and have a diameter of approximately 1.5 micrometers and a width of 2 to 8 micrometers. Mitochondria have their own DNA. Offspring inherit their mothers' mitochondria, and thus mitochondrial DNA has been useful in tracing human lineages.
View Dr Chromo's lecture on 'The cell'.
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mitochondrion on Wikipedia