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Reverted edits by LinuxArtemisbeak (Talk); changed back to last version by Ed Poor
'''Ribonucleic acid''' (RNA) is a molecule found in all cells, comprised of many individual units of [[nucleic acid]]. It differs from DNA ([[deoxyribonucleic acid]]) in that it only contains a single, not double strand, and substitutes [[uracil]] for [[thymine]]. The primary role of RNA is to transfer a copy of the information coded in DNA to a [[ribosome]] to be expressed as a protein. It is also a component of the ribosome itself.
The polio virus is an example of an organism which contains only RNA to carry its genetic information.
[[Category:Genetics]]