In
genetics, two
nucleotides on opposite complementary
DNA or
RNA strands that are connected via
hydrogen bonds are called
base pair. As DNA is usually double-stranded, the number of base pairs in the dsDNA strand equals the number of nucleotides in one of the strands. In DNA, adenine
? and thymine
?, as well as
guanine and
cytosine, can be a base pair. In RNA, thymine
? is replaced by uracil
?.
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