DNA Replication
Storyboard Text
- This is a DNA strand which I will be using to show you what the process is.
- Today Class I will be showing you the process of DNA Replication, a semiconservative process in which DNA is Replicated
- First off DNA is like a ladder, and the Step are made up of nitrogen bases. There are 4 nitrogen bases and they have 2 different pairs that go together. Adenine - Thymine and Cytosine - Guanine
- The sides of the ladder are made up of Deoxyribose and Phosphate groups, the side hold the steps together.
- The first step of DNA replication is where an enzyme called Helicase unzips the nitrogen bases by breaking the hydrogen bonds between them. Which seperates the double helix into 2 different single stranded DNA.
- The 2nd step to DNA replication is also in the cell cycle. The Cell cycle has 4 phases G-1, Synthesis phase, G-2, and Mitosis. During the S phase the DNA is copied and replicated so there are now 4 single stranded DNA.
- The Final step to DNA Replication is another enzyme named Polymerase connects one of the old strands to the new one and the other old strand to a new one by connecting the Nitrogen bases again.
- So in the end we get 2 exact replicas of a double helix DNA strand.
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