Biology
Everything alive is built from cells, and every cell runs on the same four-letter code. Open a cell up, build the DNA inside it, then put real specimens under a microscope and see it all for yourself.
The tools, in learning order
- 01Cell ExplorerSpin a 3D animal or plant cell, click each organelle and find out what it does.
- 02Virtual MicroscopeLoad a slide, switch lenses and focus on onion cells, cheek cells, blood and more.
- 03Diffusion & OsmosisWatch particles spread out, water cross a membrane, and cells swell, burst or shrivel in different solutions.
- 04Enzyme LabFit substrates into active sites, then heat, change the pH and add inhibitors until the enzyme denatures.
- 05Photosynthesis & RespirationCount the oxygen bubbles from pondweed under a lamp and find the limiting factor, day and night.
- 06PollinationFly a bee round a 3D garden: carry pollen, watch the pollen tube grow and see fruit and seeds form.
- 07Cell Division: Mitosis & MeiosisStep through mitosis and meiosis: chromosomes copy, line up, cross over and pull apart.
- 08DNA BuilderPair the bases, unzip the helix, make mRNA and translate it into a protein.
- 09Heart & CirculationFollow blood through the four chambers and valves, read the ECG and see exercise change cardiac output.
- 010Biology FormulasEvery biology equation as a calculator: magnification, Hardy–Weinberg, cardiac output and more.
Biology articles
How Temperature Affects Enzyme Activity (and Why)
Warmth speeds enzymes up until the optimum, then heat denatures them for good. The rate graph explained, plus the effect of pH, the lock and key model and exam answers.
21 October 2026 · 6 min readWhat Happens to a Red Blood Cell in Salt Water?
In pure water a red blood cell swells and bursts; in strong salt water it shrivels. See how osmosis decides which, why drips use 0.9% saline, and what plant cells do.
20 October 2026 · 5 min readAnimal Cell vs Plant Cell: What's Actually Different?
Plant and animal cells share most of their parts. Here are the real differences (cell wall, chloroplasts and a big vacuole), why each exists and the classic mix-ups.
17 October 2026 · 5 min readHow DNA Makes a Protein: Transcription and Translation
A gene is a recipe written in four letters. See how a cell copies it into mRNA, reads it three letters at a time, builds a protein, and what a one-letter mistake does.
17 October 2026 · 5 min read
