(Image: Wikimedia Commons, CC SA 3.0) The most common type of base pairing is the Watson-Crick base pair, named after James Watson and Francis Crick, who first proposed the double helix structure of ...

also called base pairs. Two types of base pairing occur: nucleotide A pairs with T, and nucleotide C pairs with G.

Prokaryotic organisms contain one type of rRNA gene that encodes three ... strict complementary base-pairing is only necessary between the first two nucleotides. The third position is referred ...