DNA Replication

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DNA replication is a fundamental process taking place within the nuclei of eukaryotic cells and is key to understanding how life functions. This Demonstration runs through a simplified version of DNA replication. There are three steps in this process. After selecting each step, move the slider. You will see how the DNA helix unwinds and uses the old DNA strand as a template to create two daughter helices.

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Step 1: The parent DNA molecule unwinds, creating two template strands.

Step 2: The DNA molecule is unzipped, and parent DNA is used as a template to create two new strands. Identical strands are created by following the base pair rules: Adenine–Thymine and Guanine–Cytosine. Based on the nucleotide order on the parent strand, the complementary strand is made.

Step 3: The DNA zips up again and rewinds. Each new DNA molecule contains one parental strand and one new strand.

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Contributed by: Priyanka Multani (April 2017)
Open content licensed under CC BY-NC-SA


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This was a project for Advanced Topics in Mathematics II, 2016–2017, Torrey Pines High School, San Diego, CA.



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