1. 5’
3’
DNA replication starts at the origin
of replication. It is a double helix
shape.
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

2. Helicase is the enzyme that
unwinds the double helix shape. It
breaks the hydrogen bonds.
3’
5’
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
H
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

3. 5’
3’
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
H
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

4. 5’
3’
Key
H
-DNA Helicase
-Phosphate
H
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

5. 5’
3’
Key
H
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

6. 5’
3’
Key
H
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

7. 5’
3’
Key
H
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

8. 5’
3’
H
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

9. 5’
3’
H
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

10. 5’
H
3’
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

11. 5’
DNA polymerase 3 synthesizes 53 and it adds continuously onto
the left side. The nitrogenous
bases add to their
complementary bases.
3’
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

12. 5’
3’
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

13. 5’
3’
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

14. 5’
3’
The leading strand which is the
left side and the right side
synthesizes discontinuously with
okasoki fragments. DNA primase
adds the DNA primers to fill the
right side.
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

15. 5’
3’
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

16. 5’
3’
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

17. 5’
3’
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine

18. 5’
3’
Polymerase changes the RNA
primers into DNA and DNAligase
seals everything up with
phosphodiester bonds.
Key
H
-DNA Helicase
-Phosphate
-Deoxyribose
Nitrogenous bases
C
3’
-Cytosine
G -Guanine
A
-Adenine
T
5’
-Thymine