1. DNA replication

2. Occurs during S phase of Interphase during the cell cycle.
Makes an exact copy of all DNA.
Is “semi-conservative” – 1 strand is “old” & the other strand is “new”.

3. Replication requires enzymes:
1) Helicase – unwinds DNA
2) DNA polymerase – puts new nucleotides in place & proofreads

4. The process of DNA replication
DNA unwinds & unzips – uses Helicase
Replication fork forms (area where 2 strands separate)
* there are several replication forks at the same time.
3) DNA polymerase adds new nucleotides to each DNA strand, following the base pair rule!

6. DNA Replication

7. RNA Transcription