DNA Replication Flashcards
1
Q
Why does DNA replicate?
A
So cells have the full amount of DNA
2
Q
How does DNA replicate?
A
- DNA helices breaks the hydrogen bonds
- Each strand acts as a template
Free floating DNA nucleotides are attracted to their complementary base pairs - Condensation joins them together
Catalysed by DNA polymerase
3
Q
What is meselson and stahls experiment?
A
- 2 samples of bacteria grown
One in a light nitrogen broth one in heavy nitrogen broth - Sample of DNA from each one was spun in a centrifuge
Heavy settled lower - Heavy nitrogen DNA were put in light nitrogen
One round of replication
Spun in centrifuge
Settled between light and heavy