rna defined in 1951 yearrna - rna;
rna - Ribonucleic acid, a molecule consisting of a large number of nucleotides attached together to form a long strand one nucleotide thick. Each nucleotide contains the sugar ribose, and one of the four different bases found in DNA except that uracil replaces thymine. In some viruses RNA is the inherited material, and may possibly undergo self-replication; but in most organisms it occurs mainly as ribosomes, to a lesser extent as Transfer RNA and less still as Messenger RNA, in all these forms being concerned in translating the structure of DNA into the structure of protein molecules. In eucaryote cells there are also various kinds of nuclear RNA.
near rna in Knolik
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