Answer;
pairing of single-ringed bases with double-ringed bases
Explanation;
- DNA is a type of nucleic acid, the other being RNA. It stores the genetic information of an organism that is passed from one generation to another.
- DNA is a double stranded molecule, which is made up of two strands, that is the leading and the lagging strand which are coiled to double a double helix.
- DNA is made up of nucleotide bases, Guanine, cytosine, adenine and thymine, also contains a sugar, deoxyribose sugar, and a phosphate group.
- The pairing of single-ringed bases with double-ringed bases maintains the same distance between the two strands in a DNA molecule.