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The way DNA is structured is part of what helps it to replicate. Now that we understand its structure, we can learn about replication!
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Firstly, the DNA double helix gets unzipped or unwound by the enzyme DNA helicase by breaking the hydrogen bonds.
Secondly, the enzyme DNA polymerase, using an RNA starter, adds the complementary pairs to the split apart DNA.
The lagging strand is composed of Okazaki Fragments, which are put together with the enzyme DNA ligase
DNA polymerase
Leading Strand
Okazaki Fragments
Replication Fork
DNA ligase
Lagging Strand
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Keep in mind that DNA replication is 5 to 3 prime, as DNA polymerase can only add nucleotides in that direction.
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While this is the process for eukaryotic cells, the process for prokaryotic cells is a little different.
Nevertheless, you still end up with two identical copies of DNA.
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