Final answer:
In DNA replication, the original or template strand and the newly synthesized strand are semiconservatively replicated, meaning each new DNA molecule contains one old and one new strand.
Step-by-step explanation:
On a normal DNA replication strand, the template (S) strand and the new (S') strand are semiconservative designations. This means that during DNA replication, each of the two strands that make up the double helix serves as a template for creating a new complementary strand. Each new double-stranded DNA molecule consists of one original parental strand and one newly synthesized daughter strand. Enzymes like helicase and DNA polymerase play crucial roles in this process, unwinding the DNA and adding new nucleotides in a semiconservative manner. The leading strand is synthesized continuously towards the replication fork, while the lagging strand is synthesized in Okazaki fragments, away from the replication fork.