DNA Replication Flashcards
Why?
To pass genetic info on to new generations of cells
What happens?
DNA copies itself
Where?
In nucleus of eukaryotic cells and in the cytoplasm of prokaryotic cells
What are nucleotide strands held together by?
Weak hydrogen bonds
What does it mean if a cell is complementary?
One strand can be used to make another strand
Step 1 A
DNA unwinds and unzips
- helicase is an enzyme that unwinds DNA
Step 1 B
Helicase breaks the hydrogen bonds between bases
Step 1 C
Helicase holds strands apart
Replication fork
Sites where spheres took and replicated occur
Step 2 A
DNA polymerase will use original strand to match the new nucleotides to the originals
Step 2 B
Complementary nucleotides bond with old strands
Step 2 C
One disagree strand is synthesized in short pieces called Okazaki fragments
What links the Okazaki fragments together in one strand
Ligase
Step 3 A
New nucleotides put in place on both old strands to produce two new DNA molecules
Step 3 B
The end product is two indentical strands, half old and half new
