DNA Replication Flashcards

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1
Q

Why does DNA replicate?

A

So cells have the full amount of DNA

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2
Q

How does DNA replicate?

A
  1. DNA helices breaks the hydrogen bonds
  2. Each strand acts as a template
    Free floating DNA nucleotides are attracted to their complementary base pairs
  3. Condensation joins them together
    Catalysed by DNA polymerase
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3
Q

What is meselson and stahls experiment?

A
  1. 2 samples of bacteria grown
    One in a light nitrogen broth one in heavy nitrogen broth
  2. Sample of DNA from each one was spun in a centrifuge
    Heavy settled lower
  3. Heavy nitrogen DNA were put in light nitrogen
    One round of replication
    Spun in centrifuge
    Settled between light and heavy
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