The separated strands of DNA are completed into two double helixes by DNA?

The separated strands of DNA are completed into two double helices through a process called DNA replication. During this process, enzymes like DNA polymerase synthesize new complementary strands by adding nucleotides to each separated strand. This occurs in the 5' to 3' direction, using the original strands as templates to ensure accurate base pairing. As a result, two identical double helices are formed, each consisting of one original and one newly synthesized strand.