DNA replication

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DNA replication

Making an exact copy of DNA

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When does DNA replication occur

Occurs late in interphase of cell cycle

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What is the significance of DNA replication

Ensures new cells formed during mitosis will be genetically identical to the parent cell

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Step one

An enzyme breaks down the hydrogen bonds between the base pairs to open the double helix

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Step two

DNA nucleotides move to the nucleus from the cytoplasm and attach to exposed bases on each DNA parent strand by complementary base pairing

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Step three

Two helices are formed from the original DNA molecule

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What does this process require

Energy from ATP, anabolic enzyme DNA polymerase ( catalyst ) to assemble DNA nucleotides