How is genetic information preserved during the copying of DNA? View Available Hint(s)for Part A The information in DNA is copied into RNA, which is used as a template to copy back to DNA.Genetic information is preserved by base pairing between A and T and between G and C across the two strands of the double helix.The information is preserved because DNA codes for RNA, which codes for protein.Genetic information is preserved in the linear sequence of the building blocks A, T, G, and C.