Guanine ( G ) is paired with cytosine ( C ) via three hydrogen bonds , in red .
Base pairing : Two base pairs are produced by four nucleotide monomers , nucleobases are in blue .
Guanine ( G ) is paired with cytosine ( C ) via three hydrogen bonds , in red .
Base pairing : Two base pairs are produced by four nucleotide monomers , nucleobases are in blue .