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nucleoside vs. nucleotide

nucleoside vs. nucleotide: What’s the difference?

Nucleotides are molecules that are the building blocks of nucleic acidsDNA and RNA. Nucleotides are a combination of phosphate groups and nucleosides—compounds consisting of a sugar, usually ribose or deoxyribose, and a nitrogen base (a purine or pyrimidine). Adenosine and thymidine are examples of nucleosides.

[ noo-klee-uh-sahyd, nyoo- ]
  1. any of the class of compounds derived by the hydrolysis of nucleic acids or nucleotides, consisting typically of deoxyribose or ribose combined with adenine, guanine, cytosine, uracil, or thymine.
[ noo-klee-uh-tahyd, nyoo- ]
  1. any of a group of molecules that, when linked together, form the building blocks of DNA or RNA: composed of a phosphate group, the bases adenine, cytosine, guanine, and thymine, and a pentose sugar, in RNA the thymine base being replaced by uracil.

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