CH 14.3: Basic Characteristics of DNA Replication Flashcards
1
Q
What are the 3 possible models of DNA replication?
A
- Conservative
- Semiconservative
- Dispersive
2
Q
What is the Conservative model of DNA replication?
A
-Both strands of the parental duplex will remain conserved & new DNA copies/ both daughter strands would consist of all new molecules
3
Q
What is the Semiconservative model of DNA replication?
A
- One strand of the parental duplex will remail conserved
- A new complementary strand is built for each parental strand consisting of new molecules
- Daughter strands= consists of one parental strand & the other one is newly synthesized
4
Q
What is the Dispersive model of DNA replication?
A
- The copies of DNA are mixtures of parental & newly synthesized strands
- SO the new DNA will be dispersed throughout each strand of daughter molecules after replication
5
Q
What is the basic mechanisms of DNA Replication?
A
- It is Semi-Conservative
- So DNA is replicated by opening up the DNA helix & making copies of both strands to make daughter helices
- These daughter helices would have one old strand & one new strand
6
Q
What are the 3 things that are needed for DNA Replication?
A
- Something to copy=parental DNA molecules
- Something to do the copying= enzyme DNA polymerase
- The building blocks to make the copy= nucleoside triphosphates
7
Q
Which enzyme is responsible for matching DNA bases w/ complementary nucleotides & then linking them together?
A
-DNA Polymerase
8
Q
What are the key characteristics of DNA Polymerase?
A
- Add new bases to the 3’ end of existing strands (synthesizes from 5’-3’)
- Require a Primer to begin synthesis & extends it
9
Q
What are the key characteristics of RNA Polymerase?
A
-They make the primer for synthesis
