1. DNA Replication

2. Recall: 1. G-1 phase 2. S phase (what happens here?) 3. G-2 phase
4. Mitosis
5. Cytokinesis

3. DNA must be duplicated before cells reproduce.
Each new cell gets an exact copy of parent DNA.

4. Replication
The process by which DNA is copied; makes an exact copy of original DNA

5. Steps in Replication 1. The helix is unwound by enzyme- DNA helicase.
2. The molecule “unzips” or splits apart between base pairs at replication fork.

6. 3. Base pairs, sugars, and phosphates from cytoplasm come in to take place of old; aided by enzyme DNA polymerase
4. End result: one side of DNA is old, one side is new.

8. DNA Replication Example: 1. DNA Strand: TCGTATTAA
2. Give the complementary strand
1. TCG TAT TAA
2. AGC ATA ATT