Which bases has double and triple bounds

DNA contains four bases:Guanine, Cytosine, Adenine, and Thymine. The complementary base pairs of guanine with cytosine and adenine with thymine connect to one another using hydrogen bonds. These hydrogen bonds between complementary nucleotides is what keeps the two strands of a DNA helix together. #DNA #Guanine #Adenine #Cytosine #thymine #genetics