Biology / Unit 6 Bio 1245 review, 2 to 3 minutes
Tracing DNA from Structure Through Replication and Repair
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The idea
This capstone traces one DNA molecule from its double-helix structure through semiconservative replication to the repair pathways that keep its sequence accurate.
Where people slip
Each safeguard catches a different class of error — proofreading during synthesis, mismatch repair immediately after, excision repair for later external damage — and none of the three substitutes for the other two.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- 1201Watson and Crick's Double-Helix Model (1953)
- 1209The Double Helix's Overall Structure
- 1211Meselson and Stahl's Semiconservative-Replication Experiment (1958)
- 1229Tracing One Replication Fork from Origin to Ligation
- 1239DNA Polymerase Proofreading
- 1241Mismatch Repair
- 1243Nucleotide Excision Repair
Unlocks
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