DNA helicase causes DNA double helix to unwind
As H bonds break between complementary bases
Forming 2 exposed strands
DNA nucleotides line up against exposed bases on DNA strands
By complementary base pairing
DNA polymerase joins adjacent nucleotides together
By forming phosphodiester bonds
Now 2 double-stranded DNA formed
Each with 1 original DNA strand, and 1 newly synthesised strand
