22. Why does DNA have to replicate? 23. What do enzymes have the ability to do?
Fill in the table below with information from the video.
Enzyme
Enzyme Nickname
24. Helicase
Functions
25. DNA Polymerase
26. Primase
27. Ligase
28. What is the name of the part of DNA where DNA replication starts?
29. What binds to the DNA strands to keep them separated?
30. What is the role of topoisomerase?
31. In which direction does the DNA Polymerase build a new strand?
32. Why is the new strand named the lagging strand?
33. What could happen is DNA Polymerase matches the wrong DNA bases?

The hershey and chase experiments involved the preparation of two different types of radioactively labeled phage. which of the following best explains why two preparations were required? a. the bacteriophage used in the experiments was a t2 phage. b. it was necessary that each of the two phage components, dna and protein, be identifiable upon recovery at the end of the experiment. c. each scientist had his own method for labeling phage, so each conducted the same experiment using a different isotope. d. establishing the identity of the genetic material required observation of two phage generations.