- base pair - one of the pairs of chemical bases joined by hydrogen bonds that connect the complementary strands of a DNA molecule or of an RNA molecule that has two strands; the base pairs are adenine with thymine and guanine with cytosine in DNA and adenine with uracil and guanine with cytosine in RNA
--1 is a kind of nucleotide
--1 is a part of deoxyribonucleic acid, desoxyribonucleic acid, DNA