6.2.1 DNA replication is the basis of inheritance and occurs semiconservatively

6.2.2 During DNA replication

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Step 1: Unwind DNA

Helicase 解旋

Helicase 解旋出 replication fork

Step 2: Replication

DNA polymerase III 组合新的DNA链（Leading Strand）

另一边Lagging Strand是不连续的，（需要有引物酶做的RNA引物）根据冈崎片段来合成一段段的DNA，最后由DNA polymerase I 去除RNA 片段，把DNA连上

6.2.3 DNA polymerase us self correcting because of its function