Molecular Biology of the Gene 7th Edition by Richard Losick, James Watson, Michael Levine, Tamara Baker, Alexander Gann

Exercise 13

Describe the role of a DNA helicase at a replication fork.
B. As a result of DNA helicase activity, topoisomerases are also required during replication. Explain how topoisomerases help DNA helicases function more efficiently.
C. During PCR, you do not have to add DNA helicase to the reaction. Explain why not.