Here's why:
* DNA Structure: DNA is a double helix made up of two strands held together by hydrogen bonds between complementary base pairs (adenine with thymine, cytosine with guanine).
* Unwinding: Before replication can start, the DNA molecule must be unwound and the two strands separated. This is achieved by an enzyme called helicase, which breaks the hydrogen bonds between the base pairs.
* Replication Fork: This separation creates a "replication fork," where each strand serves as a template for the synthesis of a new complementary strand.
Let me know if you'd like more details on the replication process!
