Definition of base pair in English:

base pair


  • A pair of complementary bases in a double-stranded nucleic acid molecule, consisting of a purine in one strand linked by hydrogen bonds to a pyrimidine in the other. Cytosine always pairs with guanine, and adenine with thymine (in DNA) or uracil (in RNA).

    • ‘Thymine glycol base pairs with A and results in a C T transition.’
    • ‘Instead, it can move within the transcription complex several base pairs upstream or downstream along the template strand.’
    • ‘The human genome consists of 3 billion base pairs of DNA, parcelled out into 24 chromosomes.’
    • ‘In DNA models of double strand breaking the base pairs are the units situated on the sites of a linear lattice.’
    • ‘This package contains a number of substitution models for nucleotides and RNA base pairs.’