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10.4-10.5 DNA Replication
Fischer
20
Biology
9th Grade
01/22/2009

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Term
Semiconservative model
Definition
When DNA replicates the new DNA is half parent and half daughter DNA.
Term
Goal of DNA replication
Definition
To produce DNA for daughter cells
Term
When does DNA replicate?
Definition
S-phase
Term
5' has _______ on the end of it?
Definition
Phosphate
Term
3' has ________ on the end of it?
Definition
A hydroxyl
Term
In which direction does DNA replicate?
Definition
5' to 3'
Term
Strands of DNA are?
Definition
Anti-parallel
Term
What enzyme pulls apart DNA?
Definition
Helicase
Term
Where are bubbles likely to form in DNA?
Definition
Where there are many A-T pairs. (A-T pairs have only two hydrogen bonds and are easier to pull apart than G-C pairs which have three hydrogen bonds.)
Term
DNA polymerase
Definition
Joins nucleotides to open DNA strand
Term
What does DNA first do in DNA replication?
Definition
Flattens and unzips
Term
What enzyme adds bases to new DNA?
Definition
DNA polymerase
Term
What enzyme connects the Okazaki Fragments?
Definition
DNA ligase
Term
Okazaki Fragments
Definition
The pieces of new DNA on the lagging strand
Term
Strand the Okazaki Fragments are on
Definition
Lagging Strand
Term
Strand with continuous synthesis
Definition
Leading Strand
Term
Strand with discontinuous synthesis
Definition
Lagging Strand
Term
Benefits of DNA replication
Definition
Ensures all somatic cells have same DNA; Copies DNA for gametes
Term
Why is DNA so accurate?
Definition
DNA polymerase and DNA ligase proofread DNA and repair injured DNA
Term
Draw DNA replication.
Definition
[image]
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