🧱01
The Cell Membrane
The fluid mosaic — bilayer, proteins, cholesterol, and sugar tags.
Open →🚪02
Membrane Transport
Diffusion, facilitated diffusion, the Na⁺/K⁺ pump, and bulk transport.
Open →🏭03
Tour the Cell
Click each organelle and light up its job.
Open →🧬04
Protein Synthesis
The central dogma — transcription then translation.
Open →🔄05
Cell Cycle & Mitosis
Interphase into mitosis — chromosomes line up and split.
Open →💧06
Tonicity & Osmosis
Isotonic, hypotonic, hypertonic — the cell swells or shrivels.
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