Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

This image to the left is showing a double helix DNA. The four bases are pairing together which Cytosine and Guanine, and Thymine and Adenine.

Nucleotide

phosphate

sugar

Nitrogen base

5’

3’ 5’

3’

The helicase is unzipping the DNA by pulling apart the bases that are connected up the DNA.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

The helicase is unzipping the DNA by pulling apart the bases that are connected up the DNA.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

The helicase is unzipping the DNA by pulling apart the bases that are connected up the DNA.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

The helicase is unzipping the DNA by pulling apart the bases that are connected up the DNA.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

The helicase is unzipping the DNA by pulling apart the bases that are connected up the DNA.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

The helicase is unzipping the DNA by pulling apart the bases that are connected up the DNA.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

The helicase is unzipping the DNA by pulling apart the bases that are connected up the DNA.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

The helicase is unzipping the DNA by pulling apart the bases that are connected up the DNA.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

The helicase is unzipping the DNA by pulling apart the bases that are connected up the DNA.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

Binding proteins are the blue circles attached to the phosphates that grab the DNA to keep it from kinking.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

Next, DNA Polymerase III is the red square that examines the Leading Strand 3’-5’ and synthesizes in 5’-’3. Also, it finds the nitrogen bases and puts them back in place.

3’

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

Next, DNA Polymerase III is the red square that examines the Leading Strand 3’-5’ and synthesizes in 5’-’3. Also, it finds the nitrogen bases and puts them back in place.

3’

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

Next, DNA Polymerase III is the red square that examines the Leading Strand 3’-5’ and synthesizes in 5’-’3. Also, it finds the nitrogen bases and puts them back in place. 5’

3’

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

5’

3’

The next step is the DNA Primase adds a RNA primer which is the purple oval.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

5’

3’

The next step is the DNA Primase adds a RNA primer which is the purple oval.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

5’

3’

The next step is the DNA Primase adds a RNA primer which is the purple oval.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

5’

3’

The Nitrogen Bases under the Lagging Strand connects to the other Lagging Strand.

Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

5’

3’

Matching Bases connect to the other bases above the RNA Primer.

5’

5’

3’5’Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

DNA Polymerase I changes the RNA Primers to DNA

5’

3’5’Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

Next the DNA ligase makes Phosphodiester bonds which are the little lines around the DNA.

5’

3’5’Key

: Cytosine

: Guanine

: Thymine

: Adenine

: Sugar

: Phosphate

: DNA Helicase

5’

3’ 5’

3’

The Nitrogen bases on the lagging strand are called Okazaki Fragments.

Why DNA Replication OccursDNA Replication occurs so that the new cells that are made will be able to do the same task as the other cells. One example is if you create a cell to digest food then the DNA will help make that process happen.

What Are Genetic MutationsGenetic mutations can occur when nitrogen bases are paired with the opposite base. Genetic mutations can cause cancer and other uncommon type have the ability to kill you.