Biology / Unit 6 Bio 1325 short lesson, about 20 seconds
The Central Dogma's One-Way Information Flow, Restated
Captions available
The idea
The central dogma's sequence-level flow runs one way, DNA to RNA to protein, and a protein's structure never rewrites the DNA that specified it.
In practice
An enzyme built from a gene's mRNA cannot feed its own amino acid sequence back into that gene's DNA.
Where people slip
This one-way rule and epigenetic regulation, per Bio 1323, are different claims — regulating expression is not rewriting sequence.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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