an organic molecule in which a nitrogenous heterocyclic base (or nucleobase), which can be either a double-ringed purine or a single-ringed pyrimidine, is covalently attached to a five-carbon pentose sugar (deoxyribose in DNA or ribose in RNA). When the phosphate group is covalently attached to the pentose sugar, it forms a nucleotide
A combination of ribose or deoxyribose with a purine or pyrimidine base (See 217)
a precursor compound that is a converted to a nucleotide by the addition of a phosphate group
A combination of one of five single or double ringed "bases" and a sugar (ribose for RNA or deoxyribose for DNA) These molecular units are the building blocks of DNA and RNA, the genetic material found in living organisms Before being added to a DNA or RNA sequence, nucleosides must have a phosphate group added (see Phosphorylation)
A building block of DNA and RNA, consisting of a nitrogenous base linked to a five carbon sugar (See Nucleoside analog )
A sugar-base compound that is a nucleotide precursor Nucleotides are nucleoside phosphates A nitrogen base linked to a sugar molecule
Any of a class of organic compounds, including structural subunits of nucleic acids. Each consists of a molecule of a five-carbon sugar (ribose in RNA, deoxyribose in DNA) and a nitrogen-containing base, either a purine or a pyrimidine. The base uracil occurs in RNA, thymine in DNA, and adenine, guanine, and cytosine in both, as part of the nucleosides uridine, deoxythymidine, adenosine or deoxyadenosine, guanosine or deoxyguanosine, and cytidine or deoxycytidine. Nucleosides usually have a phosphate group attached, forming nucleotides. Usually obtained by decomposition of nucleic acids, nucleosides are important in physiological and medical research. Those that are not part of nucleic acids include puromycin and certain other antibiotics produced by fungi
{i} organic compound found in DNA and RNA that is composed of a sugar and a base (Biochemistry)