Flashcards in Session 4-Cell Cycle Deck (10):
Which enzyme catalyses DNA replication?
How is DNA replication driven?
What are the three stages of DNA replication?
What happens during initiation?
The origin of replication is recognised
DNA polymerase is recruited
Primase helps to kick-start reaction
What does DNA helicase do?
Unwinds the double helix
DNA polymerase extends 3' ends only-what does this lead to? (3)
Leading strand (continuous)
Lagging strand (discontinuous)
Which enzyme joins fragments?
What happens in termination?
Two facing replication forks meet and DNA ligase joins the final fragments
Why are telomeres needed?
So the primer can prime to it and prevent the shortening of DNA (telomeres are non-coding DNA)