Short for ribonucleic acid, a nucleic acid molecule similar to DNA but containing ribose rather than deoxyribose. RNA is formed upon a DNA template. There are several classes of RNA molecules. They play crucial roles in protein synthesis and other cell activities: {{}}Messenger RNA (mRNA) is a type of RNA that reflects the exact nucleoside sequence of the genetically active DNA. mRNA carries the "message" of the DNA to the cytoplasm of cells where protein is made in amino acid sequences specified by the mRNA. Transfer RNA (tRNA) is a short-chain type of RNA present in cells. There are 20 varieties of tRNA. Each variety combines with a specific amino acid and carries it along (transfers it), leading to the formation of protein with a specific amino acid arrangement dictated by DNA. Ribosomal RNA (rRNA) is a component of ribosomes. Ribosomal RNA functions as a nonspecific site for making polypeptides.
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Abbreviation for ribonucleic acid.For terms bearing this abbreviation, see subentries under ribonucleic acid.
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radionuclide angiography; Registered Nurse Anesthetist; ribonucleic acid; rough, noncapsulated, avirulent

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RNA .är-.en-'ā n any of various nucleic acids that contain ribose and uracil as structural components and are associated with the control of cellular chemical activities called also ribonucleic acid see MESSENGER RNA, RIBOSOMAL RNA, TRANSFER RNA

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a nucleic acid, occurring in the nucleus and cytoplasm of cells, that is concerned with synthesis of proteins (see messenger RNA, ribosome, transfer RNA, translation). In some viruses RNA is the genetic material. The RNA molecule is a single strand made up of units called nucleotide.

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ribonucleic acid.

Medical dictionary. 2011.

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  • RNA — 〈engl. Abk. für〉 Ribonukleinsäure * * * RNA [Abk. für gleichbed. engl. ribonucleic acid], die; , s: internat. empfohlene Abk. für ↑ Ribonukleinsäure die dt. Abk. RNS soll nicht mehr benutzt werden. * * * RNA [ɛr|ɛn |a:], die; [Ab …   Universal-Lexikon

  • RNA — er en forkortelse for RiboNucleicAcid. RNA består af kæder af nukleinsyre (se DNA) og har forskellige funktioner i cellen. t RNA (t for transporter) bruges til at transportere aminosyrer hen til proteinsyntetiseringen, mens m RNA (m for… …   Danske encyklopædi

  • RNA — s.m.inv. TS biochim. → acido ribonucleico {{line}} {{/line}} DATA: 1970. ETIMO: propr. sigla dell ingl. Ribo Nucleic Acid acido ribonucleico . POLIREMATICHE: RNA di trasferimento: loc.s.m. TS biochim. RNA di trasporto: loc.s.m. TS biochim. RNA… …   Dizionario italiano

  • Rna — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. {{{image}}}   Sigles d une seule lettre   Sigles de deux lettres > Sigles de trois lettres …   Wikipédia en Français

  • RNA — [är΄en΄ā′] n. a nucleic acid that is an essential component of all cells, composed of a long, usually single stranded chain of nucleotide units that contain the sugar ribose; ribonucleic acid: see MESSENGER RNA, TRANSFER RNA, RIBOSOMAL RNA …   English World dictionary

  • RNA — RNA. (Sigla del ingl. ribonucleic acid). m. Bioquím. ARN. * * * RNA son las siglas de: 1. Red neuronal artificial. 2. Ribo …   Enciclopedia Universal

  • RNA — bioquím. Siglas del ácido ribonucleico. Medical Dictionary. 2011 …   Diccionario médico

  • RNA — RNA. См. РНК. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • RNA — RNA. = ribonucleic acid (см.). (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • RNA — ⇒ Ribonucleinsäure …   Deutsch wörterbuch der biologie

  • RNA — 〈Biochemie; engl. Abk. für〉 Ribonukleinsäure [Etym.: <engl. ribonucleic acid] …   Lexikalische Deutsches Wörterbuch

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