8.2 Study Guide Flashcards
What is the first step in DNA replication?
The DNA strands are separated by Helicase.
What is the last step in DNA replication?
Okazaki fragments are glued together by Ligase.
What are the main differences between Polymerase 1 and Polymerase 3?
Polymerase 1 edits and repairs and goes at about 20 bases per second, while Polymerase 3 is the main DNA builder and goes at about 1000 bases per second.
What is the difference between the leading strand and lagging strand?
The leading strand goes from 5’ to 3’ and allows for continuous replication, while the lagging strand goes from 3’ to 5’ and only has a discontinued replication process.
What type of DNA replication model is used (mostly) in real-life DNA replication?
Semi conservative replication is used (meaning each nucleotide base bond is made up of an original strand and a complementary strand, or no original strands at all).
What does primase do?
It adds the RNA primers.
What is a dispersed model of DNA replication?
A model showing the original nucleotides mixed and matched with the new ones from the complimentary strands.
