Glossary Term

Nucleotide

PCR TermsEN

Definition

A subunit of DNA or RNA consisting of a nitrogenous base (adenine, guanine, thymine, or cytosine in DNA; adenine, guanine, uracil, or cytosine in RNA), a phosphate molecule, and a sugar molecule (deoxyribose in DNA and ribose in RNA).

Extended Notes

Source: National Cancer Institute, NCI Thesaurus 26.09d, C709. NCI definition, reproduced without modification under CC BY 4.0. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.

Also Known As

BaseNucleotideNucleotides

References

NCI Thesaurus 26.09d — Nucleotide (C709)
Source: National Cancer Institute, NCI Thesaurus 26.09d, C709. NCI definition, reproduced without modification under CC BY 4.0.