Bio Tool #22 · DE Bio 101 · six mechanisms, signal to cell effect
Six mechanisms, each drawn as a short series of states you step through. Predict before every step, then press Next and watch one thing move. Start with a signal that never gets in; end with what we do with all of it. Every step has its own link, so a step can be opened straight from a lesson page.
Nothing is submitted. Progress saves on this device, so a second sitting picks up where the first stopped. Tap any step number to open that step; a number lights up only for a step you have finished. The button with the green ring is the one to press next. Teaching view shows every caption at once, for projecting. Slow runs every step at half speed. Fill screen hides everything but the reel. Your predictions and your one-sentence explanation stay on this device; nothing is sent anywhere and nothing is scored.
Molecules move by random collisions; the arrows show where they end up, not that they aim.
What the pictures simplify: molecules are drawn at the level of their parts, never their atoms. A hexagon is a sugar, a circle an amino acid or a phosphate, a pentagon a five-carbon sugar or a nucleotide, a rounded rectangle a base or a protein, a capsule a fatty-acid tail. The four classes keep their colours all year: carbohydrate, protein, lipid, nucleic acid. Each animation ends on the same picture as the printed figure it was drawn from.
The six figures are the author's own work, drawn from the mechanism in code on 2026-10-10. No published figure was traced, scanned, copied or adapted. The sources under each figure are the papers the mechanism is checked against, not pictures that were copied.