MOLECULAR PUZZLE / GENE REGULATION

Gene Switch

A signal arrives. Which genes should respond? Combine compatible transcription factors, enhancers, repressors, and chromatin access to build a selective expression program.

2 MINUTES · POINTER / TOUCH / KEYBOARD · OFFLINE READY
Best round: —

Illustration of a DNA regulatory region, bound proteins, and a transcription complex

REGULATION BENCH

2:00

NUCLEAR VIEW · REGULATORY SITESIllustration

Experiment brief

Transcription index and bands are model outputs. The display does not measure protein abundance or physiological response.

Regulation notebook

Your observations will appear here.

Biology behind the model

DNA regulatory sites recruit compatible proteins. Activators and repressors affect transcription, while chromatin access changes which sites can be reached. Enhancer action depends on context.

Further reading, available when online:
Regulation of Transcription in Eukaryotes
How Genetic Switches Work

ROUND REPORT

✳

For the curious at heart. A pocket-sized collection of science-inspired games.
Made for a quick break, a little discovery, and one more round.

DESKTOP / TABLET / MOBILE
Your browser is your playground.

How to play Gene Switch

Complete six gene-regulation challenges in a two-minute round. The clock starts when you press Start. Practice mode removes the deadline.

Read the required expression pattern and the available cue.
Set the external signal. Give each gene its compatible factor: A for growth, B for protection, C for maintenance.
Adjust accessible chromatin, enhancer recruitment, and repressor binding. The enhancer is DNA; its switch represents recruitment of an activating complex, not a freely moving enhancer.
Predict whether your configuration will match the target, then run the expression assay. Read the output and the feedback.
When a pattern matches, answer a mechanism question to proceed.

Open chromatin alone gives low output. An inactive or incompatible factor cannot produce high transcription. The disrupted enhancer in challenge 4 cannot be restored by its switch.

Keyboard: 1–4 select the signal; Enter runs the assay; P pauses; M toggles music; H opens help. All switches work with pointer, touch, and keyboard.

The transcription index, output bands, exact timing, and scores are game mechanics. Real expression is graded, noisy, and specific to the cell and gene. This model represents transcription, not instant protein production or a measured phenotype.

Music starts after a play action. Help, pause, and a hidden browser tab freeze the round. A saved best score stays on this browser when storage is available.