ribonucleoside
nucleoside ucleoside n. (Biochem.) A type of molecule found in all living organisms, present mostly in chemically combined form as a component of nucleic acids, and also in smaller amounts in free form, consisting of a pentose sugar bound to a purine or pyrimidine base; two types of nucleoside, {ribonucleoside} and {deoxyribonucleoside}, are present. The most common bases present in nucleosides are adenine, cytosine, uracil, guanine, and thymine, and to a lesser extent hypoxanthine and other bases are found. The most commmon ribonucleosides composed from these bases are called adenosine, cytidine, uridine, and guanosine. The forms esterified with orthophosphoric at the 5-position of the pentose are called nucleotides. The nucleotides form the monomer units which are combined into DNA and RNA, which carry the genetic information required for reproduction in all known organisms. [PJC]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Ribonucleoside — Ribonucléoside Les ribonucléosides sont des molécules biochimiques obtenu par la liaison entre une nucléobase (ou base azotée) et un ribose. Ces molécules, une fois phosphorylées, deviennent des ribonucléotides (élément constitutif de l ARN).… …   Wikipédia en Français

  • ribonucleoside — [rī΄bō no͞o′klē ə sīd΄, rī΄bōnyo͞o′klē ə sīd΄] n. any of various nucleosides in which the purine or pyrimidine base is combined with the carbohydrate ribose …   English World dictionary

  • Ribonucleoside — A ribonucleoside is a type of nucleoside including ribose as a component. [MeshName|Ribonucleosides] An example is cytidine.References …   Wikipedia

  • Ribonucléoside — Les ribonucléosides sont des molécules biochimiques obtenu par la liaison entre une nucléobase (ou base azotée) et un ribose. Ces molécules, une fois phosphorylées, deviennent des ribonucléotides (élément constitutif de l ARN). Exemples… …   Wikipédia en Français

  • ribonucleoside — noun Date: 1931 a nucleoside that contains ribose …   New Collegiate Dictionary

  • ribonucleoside — /ruy boh nooh klee euh suyd , nyooh /, n. Biochem. a ribonucleotide precursor that contains ribose and a purine or pyrimidine base. [1930 35; RIBO(NUCLEIC ACID) + NUCLEOSIDE] * * * …   Universalium

  • ribonucleoside — noun Any nucleoside component of RNA …   Wiktionary

  • ribonucleoside — A nucleoside in which the sugar component is ribose; the common ribonucleosides of RNA are adenosine, cytidine, guanosine, and uridine. * * * ri·bo·nu·cle·o·side n(y)ü klē ə .sīd n a nucleoside that contains ribose …   Medical dictionary

  • ribonucleoside — ri·bo·nucleoside …   English syllables

  • ribonucleoside — ri•bo•nu•cle•o•side [[t]ˌraɪ boʊˈnu kli əˌsaɪd, ˈnyu [/t]] n. biochem. a ribonucleotide precursor containing ribose and a purine or pyrimidine base • Etymology: 1930 …   From formal English to slang

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”