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double helix
noun
, Biochemistry, Genetics.
- the spiral arrangement of the two complementary strands of DNA.
double helix
noun
- biochem the form of the molecular structure of DNA, consisting of two helical polynucleotide chains linked by hydrogen bonds and coiled around the same axis
double helix
- The three-dimensional structure of double-stranded DNA, in which polymeric nucleotide strands whose complementary nitrogen bases are linked by hydrogen bonds form a helical configuration. The two DNA strands are oriented in opposite directions.
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Word History and Origins
Origin of double helix1
First recorded in 1953; term introduced by J.D. Watson and F.H.C. Crick
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Example Sentences
These drugs interfere with the double helix zip-unzip-zip-again process of RNA and DNA replication.
From The Daily Beast
This process, known as epigenetics, involves the addition of small chemical tags known as methyl groups to the DNA double helix.
From The Daily Beast
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