base pair·ing -'pa(ə)r-iŋ, -'pe(ə)r- n the pairing of purine and pyrimidine bases cross-linked by hydrogen bonds in two complementary strands of DNA
* * *
the linking of the two strands of a DNA molecule by means of hydrogen bonds between the bases of the nucleotides. Adenine always pairs with thymine and cytosine with guanine. See DNA.
* * *
the bonding between purines and pyrimidines in nucleic acids; see under pair.Medical dictionary. 2011.