"Excellent. Answered all those questions I had that are never covered in text books, such as how big is a piece of DNA?"
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The diagram below shows a gel electrophoresis plate which has been used to separate DNA fragments produced as a result of the DNA sequencing process shown above.
All of the DNA fragments started at the bottom of the plate. The current during electrophoresis flowed in such a way that they were carried up the plate in the direction of the arrow.
Use your knowledge of DNA sequencing, together with the information from the electrophoresis, to work out the sequence of the original strand of DNA, starting at the 5' end.
Enter your answers by selecting the correct nucleotide base from the drop down menu under each section of the strand.
Click on the button at the bottom of the page to see if you have worked out the sequence correctly.