1. DNA polymerase: This enzyme is responsible for synthesizing new DNA strands using the existing strand as a template. It reads the template strand and adds complementary nucleotides to the new strand, ensuring accurate replication.

2. DNA helicase: This enzyme unwinds the double helix of DNA, separating the two strands so that each strand can serve as a template for replication. It breaks the hydrogen bonds holding the base pairs together, allowing the strands to separate.

There are other important enzymes involved in DNA replication, but these two are considered the most essential.