DNA Replication Worksheet - HARABIN'S BIOLOGY
DNA Replication Practice Worksheet Name Per.
You will draw out the steps of DNA replication. In each box, draw the event described. You will use 3 different colors: one for the original strands of DNA, one for the leading strand, and one for the lagging strand. You must label all the bold words in each drawing and indicate the 5’ and 3’ ends of each strand with direction arrows. Use the drawing on the back to help you.
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|1. Draw the DNA double helix, with the |2. Helicase (() begins to unwind the DNA at|3. DNA polymerase adds complementary bases |4. DNA polymerase adds complementary bases |5. Two DNA double helices are formed, |
|sequence on the 5’ to 3’ strand: |the replication fork. |in the 5’ to 3’ direction to form the |discontinuously in the 5’ to 3’ direction |showing semiconservative replication (show |
|ACCGTATTGATC, then write its complementary | |leading strand. |to form Okazaki fragments on the lagging |what this means). Be sure to include bases |
|bases on the other strand. | | |strand & are joined by DNA ligase. |on all strands. |
DNA Strands KEY: = original = leading strand = lagging strand
S Phase: Replication Fork
On the following drawing, label the directions (5’ and 3’) on both strands. Also label: leading strand, lagging strand, Okazaki fragments, replication fork, and DNA polymerase.
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