PRESENTATION OUTLINE
DNA Replication: Steps
1. The DNa double helix needs to unwind and the two strands need to seperate.
2. The enzymes helicase is responsible for this process.
3. Free nucleotides which are floating around in the nucleus form complementary pairs with the nucleotides of both of the DNA strands.
DNA Replication: Cont.
4. The nucleotides which have formed complementary base pairs with the nucleotides on the old strand now join to each other to form a new strand or DNA. (DNA polymerase is responsible for this process)
5. The enzyme DNA ligase seals up the breaks in the Okazaki fragments.
6. This results in two identical double helix strands. Each one with one old strand and one new strand.
Leading Strand:
DNA replication happens from the 5 to 3 ends, so replication happens faster on the leading strand.
Lagging Strand:
The lagging strand is called the lagging strand because its replication happens slower than the leading strand. This is because since the lagging strand isn't 5 to 3 it replicates in Okazaki fragments and has to move away from replication forks.
