The Molecular Machine
Move beyond the 'cell as a bag of soup' and discover the intricate molecular engineering that powers life. Learn how proteins fold into tools, how cells make decisions, and how energy is harvested through microscopic motors.
Like Duolingo, but for The Molecular Machine. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
A short one: 9 levels across 2 sections, about 18 minutes end to end, roughly 4 days at five minutes a day. It moves through The Mechanics of Life and The Dynamic Blueprint. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android

Key ideas in The Molecular Machine
- Hydrophobic side chains cluster in the protein interior to avoid water
- Active sites are physical pockets shaped to fit specific substrates
- The specific folding pattern creates unique binding surfaces for substrates
- Enzymes lower activation energy by stabilizing the transition state
- Changing a single link can cause the entire 'origami' structure to misfold
- The 'induced fit' model involves the enzyme squeezing the substrate
- Protein folding and hydrophobic core
- Enzyme mechanisms
- Heat breaks the weak hydrogen bonds that maintain a protein's 3D shape
- Allosteric binding triggers a conformational change throughout the protein
- Denaturation exposes hydrophobic cores, causing proteins to clump together
- How the sequence of amino acids dictates the specific 3D structure and function
- The shape shift at the distant site distorts the active site's 'lock'
- Structural collapse is usually permanent because the folding path is lost
- Regulation allows cells to toggle pathways based on molecule concentration
- The physical mechanism of active sites in lowering activation energy
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives The Molecular Machine the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
What do we call the specialized physical pocket where an enzyme grips its target molecule?
Get it right to open this lesson and 8 more in the app.
How to learn The Molecular Machine, step by step
Go in order. 9 short levels across 2 sections, about 18 minutes in all, five minutes a day.
- 1
The Mechanics of Life
- Proteins: The Shape of Function
- The Gradient: Life’s Real Battery
- 2
The Dynamic Blueprint
- Cellular Logic and Signaling
- The Regulated Genome
2 sections · 4 units · 9 levels. Built to play, not to enroll.
Questions about The Molecular Machine
How do I learn The Molecular Machine?
Go in order: start with The Mechanics of Life, then The Dynamic Blueprint. On Tomo that's 9 short levels, about 18 minutes in all, played five minutes a day. Start free and play the first level in under a minute.
Is there a Duolingo-style app for The Molecular Machine?
Yes. Tomo works like Duolingo: short daily lessons, streaks and quick quizzes. The Molecular Machine is one of its free courses, and you can type any other topic to get a course of your own.
Is The Molecular Machine free?
Yes. The Molecular Machine is playable on Tomo's free plan, which doesn't expire. No credit card, no waitlist. Download the app and start your first lesson.
How long does it take to learn The Molecular Machine?
9 levels across 2 sections, about 18 minutes of play in total. It's built for five minutes a day, so you finish it a little at a time instead of all at once.
Do I need any background to start The Molecular Machine?
No. It's pitched at an intermediate level, so it starts where you are and builds up. If you can tap a phone, you can start.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
The Molecular Machine is taught in the Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start The Molecular Machine today.
Download Tomo, search The Molecular Machine, and play your first lesson in under a minute.