Collection
DNA, replication, transcription, translation and cell division as explorable 3D models.
Apps
Zoom from the chromosome via the nucleosome to the double helix and a single nucleotide, with a true scale bar. Tap base pairs, unwind and open the helix, show grooves and dimensions, and watch the antiparallel complementary strand form for a sequence you type.
Biology (Gymnasium)Try it
One DNA becomes two: replication bubbles open at many origins and merge while an enzyme team builds the new strands at every fork. Old strands stay visible in colour, and the Meselson-Stahl comparison shows why replication is semiconservative.
Biology (Gymnasium)Try it
Close-up of a replication fork in 3D: both polymerases work only 5′→3′, so the leading strand grows in one piece and the lagging strand in Okazaki fragments. The trombone model in motion, with primer replacement, a ligase switch and a bacterium/eukaryote comparison.
Biology (Gymnasium)Try it
An RNA polymerase reads a gene in 3D: the bubble travels along and the mRNA grows 5′→3′ on the template strand. For eukaryotes with cap, poly-A, splicing (lariat, alternative splicing) and export through the nuclear pore; enter your own DNA sequence.
Biology (Gymnasium)Try it
A ribosome reads the mRNA codon by codon: charged tRNAs act as adapters and deliver their amino acid to the A site, the rRNA forms the peptide bond, until a stop codon releases the protein. Change bases or the reading frame and watch the protein change live, up to a polysome.
Biology (Gymnasium)Try it
Tap a base in the real β-globin gene and watch the mRNA and amino acid chain rearrange: silent, missense, nonsense or frameshift. Plus the sickle cell, chromosome and genome mutations, and UV damage with repair.
Biology (Gymnasium)Try it
A 3D cell divides: interphase to cytokinesis on a scrubbable timeline, with counters for chromosomes, chromatids and DNA content. It shows why both daughter cells receive the same chromosome set.
Biology (Gymnasium)Try it
One diploid cell becomes four different gametes: follow in 3D how meiosis I separates homologous chromosomes and meiosis II sister chromatids. With crossing over, a shuffle for random assortment, n/2n and DNA counters, and nondisjunction leading to trisomy 21.
Biology (Gymnasium)Try it
The Meselson–Stahl experiment as a 3D lab story: from the ¹⁵N culture through the ultracentrifuge to the UV image of the bands. Compare the predictions of conservative, semiconservative and dispersive replication with the measurement and find out which generation refutes which hypothesis.
Biology (Gymnasium)Try it
A real protein chain folds before your eyes: hydrophobic collapse, helices and sheets, energy funnel and Levinthal calculation. Heating unfolds it, cooling folds it again.
Biology & neuroscienceTry it
A human body cell at 1 unit = 1 µm: nucleus with double envelope, nuclear pores and chromatin, rough ER continuous with the nuclear envelope, smooth ER, Golgi (cis/trans), endosomes, lysosomes, peroxisomes, mitochondria with cristae and mtDNA, centrosome, microtubules, actin cortex and intermediate filaments. The secretory pathway in seven scrubbable phases: transcription, nuclear pore, translation at the rER, COPII to the Golgi, cis→trans, vesicle on a microtubule, exocytosis. Cutting plane, layers and a membrane loupe.
Biology & neuroscienceTry itCollections
Mathematical questions open for decades, for which an AI model proposed solutions in 2026, as interactive apps: understand the problem, experience the result.
24 appsOpen collection
From neurons and gradients to transformers, RLHF and agents: machine learning you can touch.
39 appsOpen collection
Perspective, ornament, structure and space: how art and architecture work with mathematics.
9 appsOpen collection
Hyperloop, autonomous vehicles, warehouses and conveyors: logistics as interactive simulation.
17 appsOpen collection
Heart, eye, voice, skeleton and nerves: the human body in 3D, layer by layer.
8 appsOpen collection
Monty Hall, Simpson, Berkson and base rates: where intuition fails us with numbers.
14 appsOpen collection
Planets, stars, black holes and space probes: the cosmos to explore.
6 appsOpen collection
Riemann, P vs NP, Poincaré and other great questions of mathematics, made tangible.
16 appsOpen collection
Counting, arithmetic and shapes: maths for beginners, playful and clear.
6 appsOpen collectionWant to use these apps in your courses? Let’s find out what works for you.
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