Final answer:
Option D) The new DNA molecule has two newly-made strands is not true about DNA replication. The correct model of DNA replication is semi-conservative, where each new DNA molecule includes one original strand and one new strand.
Step-by-step explanation:
The question concerns DNA replication, a process during which the DNA helix unwinds and the two single strands of DNA each serve as a template for a new strand to be created.
In the given options, option D) The new DNA molecule has two newly-made strands is the one that is not true about DNA replication. In the semi-conservative model of DNA replication, each of the two resulting DNA molecules consists of one original or "old" strand and one "new" or daughter strand.
DNA helicase plays a critical role during replication as it breaks the hydrogen bonds between nucleotides, which allows the DNA to unwind and unzip.
Then, DNA polymerase attaches new nucleotides to the original strands, creating the new complementary strands. This ensures that each new DNA molecule is an exact copy of the original DNA molecule, preserving genetic information through generations.
Furthermore, during the replication process, various enzymes are involved such as topoisomerase, single-stranded binding proteins, primase, and DNA ligase, each playing a specific role to ensure accurate and efficient replication.
As for the correct option, it's important to remember that DNA replication results in two double-stranded DNA molecules, each consisting of one parental strand from the original DNA molecule and one new complementary strand.