1. DNA Replication Section 12-2
Objectives:
8.0 Identify the structure and function of DNA, RNA, and protein.
8.1 Explaining relationships among DNA, genes, and chromosomes

2. DNA Nitrogenous Bases:
Adenine
Thymine
Cytosine
Guanine
The base pairings:
Adenine and Thymine
Cytosine and Guanine

3. DNA Replication Occurs in S (synthesis) phase of Interphase
As the double helix separates into 2 strands, the hydrogen bonds holding together the nucleotide bases break.
Each strand has a new complement strand formed:
Each Adenine connects with a new Thymine.
Each Cytosine connects with a new Guanine.
AND VICE VERSA!!!!

4. The Purpose of Replication
Replication occurs prior to cell division, so that new cells can form with complete sets of DNA.
Practice:
Write out a 24-base nucleotide sequence. (You MUST Use Color!!!!)
Exchange sequences with someone.
Write out the complement strand for your partner’s sequence.
What have you just created? 

5. Build a DNA Molecule Online Activity
Diagrams source: