1. Wake-up Draw and label a nucleotide.
DNA is better known as a double helix (twisted ladder).
What thing(s) make up the handles?
What thing(s) make up the steps?

2. DNA Replication
Christopherson

3. DNA: Deoxyribonucleic Acid

4. DNA: Location/Structure

5. Practice with Base Pairing: #1
Sugar and Phosphate
A T C G G C T A C G A T
T A G C C G A T G C T A
Sugar and Phosphate

6. Practice with Base Pairing: #2
Sugar and Phosphate
G G T C A T G C T A A A
C C A G T A C G A T T T
Sugar and Phosphate

7. DNA Replication: Purpose
To make copies of DNA

8. Replication: Why?
Growth/Make new cells

10. Replication: Why?
Replace old cells

11. Human Skin

12. DNA Replication

13. Double Helix
Phosphate
Deoxyribose
Nitrogen Base

14. Steps in DNA Replication #1
DNA Helicase (enzyme) attaches to DNA strand.
Helicase unwinds DNA by breaking the hydrogen bonds holding together the bases

15. Helicase
Helicase
Double Helix
Phosphate
Deoxyribose
Nitrogen Base

16. Steps in DNA Replication #2
DNA Polymerase (enzyme) attaches to exposed strands.
It adds matching nucleotides.
It also proofreads its work to make sure there is no mistakes.

17. DNA Polymerase
DNA Backbone T A C G
Nucleotide

18. Steps in DNA Replication #3
Old
Old
New
New
Produce 2 identical strands of DNA

19. DNA Replication Animation

20. DNA Replication: Complex
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