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OperonBiology
Systems-level pathway visualizer

Pathways

Each pathway is a live model. Step through its stages, change one variable, and see which steps upstream and downstream shift, and why.

Cellular Respiration

Glycolysis → pyruvate oxidation → Krebs cycle → oxidative phosphorylation, with inhibitors, uncouplers, O₂ supply and ATP demand.

  1. 1 Glycolysis & fermentation
  2. 2 Pyruvate oxidation
  3. 3 Krebs cycle
  4. 4 Electron transport chain
  5. 5 Chemiosmosis & ATP synthesis
APOlympiad8 scenarios
Open

Lac Operon

Repressor, operator and CAP–cAMP logic, including merodiploids that separate cis-acting from trans-acting mutations.

  1. 1 Glucose sensing: cAMP–CAP
  2. 2 Repressor & operator
  3. 3 Lactose uptake & induction
  4. 4 Transcribing lacZYA
  5. 5 Cis vs. trans in a merodiploid
APOlympiad9 scenarios
Open