: any of various nucleic acids that are usually the molecular basis of heredity, are constructed of a double helix held together by hydrogen bonds between purine and pyrimidine bases (see baseentry 1 sense 6b) which project inward from two chains containing alternate links of deoxyribose and phosphate, and that in eukaryotes are localized chiefly in cell nuclei compare recombinant dna
Illustration of DNA
A molecular model
1 hydrogen
2 oxygen
3 carbon in the helical phosphate ester chains
4 carbon and nitrogen in the cross-linked purine and pyrimidine bases
5 phosphorus
B double helix
Examples of DNA in a Sentence
Recent Examples on the Web
Examples are automatically compiled from online sources to
show current usage.Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
The surprise selection is Cubert, a 12-year-old clone created from DNA extracted from a growth on Hubert's back.—Richard Edwards, Space.com, 26 Mar. 2025 Loading your audio article SAN JOSE — A Santa Clara County judge sentenced a man Monday to eight years in prison in a three-decade-old cold case kidnapping solved by DNA evidence in 2022.—Caelyn Pender, The Mercury News, 26 Mar. 2025 Last week, Zeigler’s legal team filed a motion based on new DNA evidence that his attorneys say proves Zeigler is innocent of the quadruple murders for which he was convicted in 1976.—Scott Maxwell, The Orlando Sentinel, 26 Mar. 2025 The identification cannot be confirmed until officials compare the remains to Schepers’ collected DNA or her dental records, police said.—Kate Linderman, Kansas City Star, 26 Mar. 2025 See All Example Sentences for DNA
: any of various nucleic acids that are located especially in cell nuclei, are usually the chemical basis of heredity, and are composed of two nucleotide chains held together by hydrogen bonds in a pattern resembling a flexible twisted ladder compare rna
: any of various nucleic acids that are usually the molecular basis of heredity, are constructed of a double helix held together by hydrogen bonds between purine and pyrimidine bases which project inward from two chains containing alternate links of deoxyribose and phosphate, and that in eukaryotes are localized chiefly in cell nuclei
Share