Name: ______________________________ Date: ___________ Block: _____
DNA Replication Quest
USE PUFFIN!!
If you do not have an iPad, read the hard copies!
Use the websites provided in the “DNA Replication Web-quest” in my website,
Chapter 9 DNA folder, to answer the questions below about DNA replication.
Click on http://www.yourgenome.org/facts/what-is-dna-replication
1. What is DNA replication?
_________________________________________________________________
2. What holds complementary bases (A & T) together? ________________________
3. What is the first step in DNA replication? _______________________________
4. The two separated strands will act as ____________________ for making the
_________________________________.
5. One of the strands is oriented in the ___________________________ this is the
________________________. The other strand is oriented in the _____________
________________________ (away from the replication fork), this is the
________________________. As a result of their different orientations, the two
strands are replicated differently:
6. Sketch the image of the DNA replication fork pictured below step 4.
Click on
http://www.wiley.com/college/pratt/0471393878/instructor/animations/dna_replicatio
n/index.html
USE PUFFIN! If you do not have an iPad, read the hard copy!
7. Why is DNA replication said to be semi-conservative? _____________________
________________________________________________________________
8. What enzyme unwinds the DNA strands? ___________________________
9. What is the function of primase? ______________________________________
________________________________________________________________
10. What is the function of polymerase? __________________________________
________________________________________________________________
11. The leading strand is synthesized _________________________, while
the lagging strand is synthesized ___________________________.
12. DNA pieces separated by primers in the lagging strand are called
_____________________________.
13. List the 4 events that must occur in the lagging strand prior to completing its
replication. In other words, how are Okazaki fragments on the lagging strand joined into
one continuous strand?