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| Ribosomes are small structures found in all living cells. They can be free in the [[Cytoplasm|cytoplasm]] or attached to Endoplasmic Reticulum (.R), making Rough ER. They can differ in size and number, according to whether they are found in [[Bacteria|bacteria]], [[Archaea|archaea]] or in [[Eukaryotes|eukaryotes]]. There are a large number of ribosomes in cells. In [[Eukaryotes|eukaryotes]], there can be millions in one cell alone. As ribosomes are so small, (it has a diameter of 25-30 nm approximately)<ref>Becker, Wayne M., Kleinsmith, Lewis J., Hardin, Jeff., Bertoni, Gregory Paul. (2009) The World of the Cell, 7th Edition, San Francisco: Pearson Benjamin Cummings. P95.</ref>, an [[Electron Microscope|electron microscope]] is needed to see it.<br>Ribosomes are made up of two subunits, one larger than the other. The two subunits join together when attached to [[MRNA|mRNA]] to make a [[Protein|protein]] in [[Protein synthesis|protein synthesis]].<br>Ribosomes are also found in [[Mitochondria|mitochondria]] and [[Chloroplasts|chloroplasts]] and carry out [[Protein synthesis|protein synthesis]], specifically for these [[Organelles|organelles]].<br><br>
| | See [[Ribosome|Ribosome]]<br> |
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| === References ===
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| <references />
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Latest revision as of 17:16, 14 November 2011