DNA Structure, Function and Replication. DNA is a long molecule that consists of two strands of nucleotides twisted together in a long spiral called a double helix. ... The base-pairing rules describe which bases pair together in a DNA double helix ... work together to produce two identical copies of the original DNA molecule.=DNA Structure; DNA Function; RNA; Replication; Transcription; Translation ... The two strands are wound round each other to form a double helix. The two strands are joined together by hydrogen bonds between the bases. ... before every cell division, so that one identical copy can go to each daughter cell.=Because the two strands of a DNA molecule have complementary base pairs, the nucleotide ... each can be used as a pattern or template to produce a complementary strand. ... together then form a new DNA double helix, identical to the original. ... The enzyme DNA polymerase then moves along the exposed DNA strand
