General notes on DNA structure/replication.

1. DNA Replication
Occurs inside the nucleus!

3. Nitrogenous Base (Adenine)

4. Nitrogenous Base (Adenine)

5. Nitrogenous Base (Adenine)
Complementary Base Pairs
Adenine (A) - Thymine (T)
Cytosine (C) - Guanine (G)
Purines - Adenine, Guanine
Pyrimidines - Cytosine, Thymine

6. Nitrogenous Base (Adenine)
Complementary Base Pairs
Adenine (A) - Thymine (T)
Cytosine (C) - Guanine (G)
Purines - Adenine, Guanine
Pyrimidines - Cytosine, Thymine

7. “Backbone”
Nitrogenous Base (Adenine)
of DNA
Complementary Base Pairs
Adenine (A) - Thymine (T)
Cytosine (C) - Guanine (G)
Purines - Adenine, Guanine
Pyrimidines - Cytosine, Thymine
Nucleotide
-monomers of DNA

8. Nitrogenous Base (Adenine)
Complementary Base Pairs
Adenine (A) - Thymine (T)
Cytosine (C) - Guanine (G)
Purines - Adenine, Guanine
Pyrimidines - Cytosine, Thymine
Nucleotide
Hydrogen Bond

11. A.K.A
- Leading Strand

12. A.K.A
- Leading Strand
A.K.A
- Lagging Strand

13. DNA Helicase
“Unzips” DNA
A.K.A
- Lagging Strand
A.K.A
- Leading Strand

14. DNA Helicase
“Unzips” DNA
A.K.A
- Lagging Strand
A.K.A
- Leading Strand
DNA Polymerase
- adds nucleotides continuously
on Strand I

15. DNA Helicase
“Unzips” DNA
A.K.A
- Leading Strand
A.K.A
- Lagging Strand
DNA Polymerase
- adds nucleotides continuously
on Strand I
…but
discontinuously on Strand II
using “Okazaki Fragments”

16. DNA Helicase
“Unzips” DNA
A.K.A
- Leading Strand
A.K.A
- Lagging Strand
Okazaki
Fragments
DNA Polymerase
- adds nucleotides continuously
on Strand I
…but
discontinuously on Strand II
using “Okazaki Fragments”

17. DNA Helicase
“Unzips” DNA
A.K.A
- Leading Strand
A.K.A
- Lagging Strand
Okazaki
Fragments
DNA Polymerase
- adds nucleotides continuously
on Strand I
…but
discontinuously on Strand II
using “Okazaki Fragments”
The fragments are “stitched”
together by the enzyme Ligase