DNA Replication

By Brittney Manges

A T

GC

Key

= Phosphate

= Sugars

A

T A

G C

A T

= Adenine

T =Thymine

G = Guanine

C = Cytosine

DNA helicase breaks the the bonds and unzips DNA.

= Sugars = Primer

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G = Guanine

C = Cytosine

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

=Helicase

= Sugars = Primer

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

Key

= Phosphate =Helicase = Sugars

A = Adenine

T =Thymine

G = Guanine

C = Cytosine

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

= Sugars = Primer

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G = Guanine

C = Cytosine

=Helicase

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

= Sugars = Primer

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G = Guanine

C = Cytosine

=Helicase

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

= Sugars = Primer

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G = Guanine

C = Cytosine

=Helicase

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

= Sugars = Primer

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G = Guanine

C = Cytosine

=Helicase

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

= Sugars = Primer

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

Key

= Phosphate

= Sugars = Primer

A = Adenine

T =Thymine

G = Guanine

C = Cytosine

=Helicase

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G = Guanine

C = Cytosine

=Helicase

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

= Sugars = Primer

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G = Guanine

C = Cytosine

=Helicase

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

= Sugars = Primer

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G = Guanine

C = Cytosine

=Helicase

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

= Sugars = Primer

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G

C = Cytosine

= Guanine

=Helicase

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

= Primer

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

T A

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G

C = Cytosine

= Guanine

=Helicase

= Primer

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

T A

GC

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G

C = Cytosine

= Guanine

=Helicase

= Primer

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

T A

GC

TA

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G

C = Cytosine

= Guanine

=Helicase

= Primer

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

T A

GC

TA

CG

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G

C = Cytosine

= Guanine

=Helicase

= Primer

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

T A

GC

TA

CG

AT

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G

C = Cytosine

= Guanine

=Helicase

= Primer

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

T A

GC

TA

CG

AT

C G

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G

C = Cytosine

= Guanine

=Helicase

= Primer

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

T A

GC

TA

CG

AT

C G

A T

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G

C = Cytosine

= Guanine

=Helicase

= Primer

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’

T A

GC

TA

CG

AT

C G

A T

CG

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G

C = Cytosine

= Guanine

=Helicase

= Primer

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’ T A

GC

TA

CG

AT

C G

A T

CG

AT

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G

C = Cytosine

= Guanine

=Helicase

= Primer

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

A T

G

T A

G C

A T

C G

T A

G C

A T

C

5’

5’

3’

3’ T A

GC

TA

CG

AT

C G

A T

CG

AT

Key

= Phosphate

= Sugars

A = Adenine

T =Thymine

G

C = Cytosine

= Guanine

=Helicase

= Primer

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

A T

GC

T A

G C

A T

A T

GC

T A

G C

A T

The place helicase begins is called the origin of replication. It usually starts at an Adenine and Thymine bond because it is only a double bond while Guanine and Cytosine has a triple bond. DNA Polymerase III reads in a 3’-5’ but synthesis in 5’-3’. DNA Primase attaches on to DNA and adds RNA primers. The primer then continues on until it meets the previous primer, then it turns into DNA. Polymerase I is there so there is no RNA. DNA Ligase forms phosphodiester bonds to complete that strand of DNA.

Why DNA needs to replicate.

• DNA needs to replicate because if something happens to a different piece of DNA the body needs to be able to make another copy to replace it. Also, it happens in the phase of mitosis called interphase. A mutation can be caused by an incorrect pair of nitrogen base pairs.

The End!