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nucleoside    
核苷; 核甙

核□; 核□

nucleoside
n 1: a glycoside formed by partial hydrolysis of a nucleic acid

nucleoside \nucleoside\ 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]


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  • Nucleoside - Wikipedia
    A nucleoside consists simply of a nucleobase (also termed a nitrogenous base) and a five-carbon sugar (ribose or 2'-deoxyribose) whereas a nucleotide is composed of a nucleobase, a five-carbon sugar, and one or more phosphate groups
  • Nucleoside | Description, Function Facts | Britannica
    A nucleoside is a structural subunit of nucleic acids, the heredity-controlling components of all living cells, that consists of a sugar molecule linked to a nitrogen-containing organic ring compound
  • Nucleoside- Definition, Types, Structure, Functions
    A nucleoside is a molecule with a pentose sugar linked to a nitrogenous base or glycosylamines without a phosphate group attached to it
  • Nucleotide - Wikipedia
    With all three joined, a nucleotide is also termed a "nucleo side mono phosphate", "nucleoside di phosphate" or "nucleoside tri phosphate", depending on how many phosphates make up the phosphate group
  • 1. 1: Nitrogenous bases, Nucleosides and Nucleotides
    Nucleotide structure review Recall some basic structural features of the nucleotide building blocks of DNA A nucleotide is composed of a nitrogenous base, deoxyribose (five-carbon sugar), and at least one phosphate group The nitrogenous bases are purines such as adenine (A) and guanine (G), or pyrimidines such as cytosine (C), thymine (T), and uracil (U) Figure 1 Each nucleotide is made up
  • Nucleoside – Definition, Types, Structure, Functions
    A nucleoside is a type of organic molecule consisting of a nitrogenous base (also known as a nucleobase) and a sugar molecule The sugar in a nucleoside can be either ribose or deoxyribose, and it is linked to the nitrogenous base through a glycosidic bond
  • Nucleoside vs Nucleotide - Difference and Comparison | Diffen
    A nucleoside consists of a nitrogenous base covalently attached to a sugar (ribose or deoxyribose) but without the phosphate group A nucleotide consists of a nitrogenous base, a sugar (ribose or deoxyribose) and one to three phosphate groups
  • Nucleotide | Description, Types, Function, Facts | Britannica
    A nucleotide is any member of a class of organic compounds in which the molecular structure comprises a nitrogen-containing unit (base) linked to a sugar and a phosphate group
  • Nucleotides and Nucleosides – Definition, Structure, Function, Types
    A nucleoside is made up of just a nucleobase (also called a nitrogenous base) and a five-carbon sugar (ribose or 2′-deoxyribose), while a nucleotide is made up of a nucleobase, a five-carbon sugar, and one or more phosphate groups
  • Nucleic Acids- Nucleosides and Nucleotides - Microbe Notes
    In a nucleoside, the base is bound to either ribose or deoxyribose via a beta-glycosidic linkage at 1’ position Examples of nucleosides include cytidine, uridine, adenosine, guanosine, thymidine and inosine





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