How Cells Copy DNA Perfectly (Almost Every Time)

Molecular Mirroring: DNA replication doubles the code before every cell division.
Precision Work: Enzymes unzip the helix and build matching strands with near-flawless accuracy.
Error Rate: Only about one mistake occurs in a billion DNA letters copied.
Repair Patrol: Proofreading enzymes catch and fix most copying errors instantly.
Cellular Photocopier: Every new cell inherits a perfect genetic manual.
Timing Is Everything: Replication happens during a precise window of the cell cycle.
Double-Check System: Cells use multiple checkpoints to ensure clean duplication.
Energy Investment: Replicating your entire genome takes massive molecular effort.
Chain Reaction: Billions of nucleotides snap together like coded puzzle pieces.
Evolution’s Editor: The rare mistakes that slip through fuel long-term adaptation.