1. DNA History and Structure
Unit 3

2. What organic compound is DNA an example of?
Remember, DNA is an example of a nucleic acid!

3. What is DNA made of?
Remember, Nucleic Acids are made of nucleotide monomers!
Monomer
Polymer

4. DeoxyriboNucleicAcid
What does DNA stand for?
DeoxyriboNucleicAcid
This part tells you about the sugar

5. What does a nucleotide look like?

6. How do the nucleotides fit together?
The sugars and phosphates make up the backbone
The nitrogen bases are in the center
(A, T, C, G)

7. How do you know which nitrogen bases go together?
Erwin Chargaff came up with the rules:
A=T G=C

8. DNA is made of two strands of nucleotides twisted around each other
What does DNA look like?
DNA is made of two strands of nucleotides twisted around each other

9. Who figured out what DNA looks like?
James Watson and Francis Crick discovered that DNA is a double-helix (2 strands, both are twisted)

10. DNA is in the nucleus (center) of every cell!
Where can I find DNA?
DNA is in the nucleus (center) of every cell!