Part 1 Climate Change and Corresponding Efforts in China. Many observations in recent 100 years show that the earthâs climate is now. experiencing significant change characterized by global warming. And the trend of. climate change in China is generally consistent with that of global climate change.
Primase synthesizes the RNA primer that is used to start an Okazaki fragment on the lagging strand. DNA polymerase III continues to add nucleotides to the leading strand right at the replication fork. DNA polymerase I (not at the replication fork) replaces the RNA primers with DNA nucleotides. DNA ligase, also not at the replication fork fuses the new nucleotides produced by polymerase I with the adjacent strand. Replication continues until there are two completely seperate DNA strands that are identical.
Best Answer: Because the DNA molecule is twisted over on itself, the first step in replication is to unwind the double helix by breaking the hydrogen bonds. This is accomplished by an enzyme called helicase.his is called semiconservative.. In short, here are the steps in concise form: 1. Helicase unwinds our double helix into two strands. 2. Polymerase adds nucleotides to an existing strand. 3. Ligase brings together the Okazaki fragments. 5. Topoisomerase cuts and rejoins the helix. 6.