Eterna vs Total Biochem

Eterna is a citizen science game where players learn to design RNA molecules for medical research by solving puzzles. Complete introductory puzzles to unlock lab access and participate in challenges where you can invent medicine!

A complete biochemistry study app with a bonus night-shift mystery game. Drill every topic and read every pathway — then take a case on the metabolic service, where the same biochemistry is the only thing that tells you what's wrong with the patient. STUDY — EVERYTHING BEFORE THE EXAM (AND AFTER) • 3,300+ Practice Items: 37 drill topics from amino acids to metabolic integration — enzyme kinetics, the pathways, inborn errors, lab methods, the central dogma, and more. Built for course exams, MCAT review, and anyone coming back to biochemistry. • A Lesson for Every Topic: the rules, the traps, and figures drawn the way the exam draws them — kinetics plots and pathway boards you can actually read. • Flashcards & Cheat Sheets: 31 decks and 550+ cards with spaced review, plus pinned reference sheets — the pKa ladder, the control points, the compartments, the quick reference. • Mock Exams & the Course Map: build a practice test with pace presets and exam-style deferred feedback, fix what you missed, and clear units on the Course Map. • Mechanisms, Arrow by Arrow: 15 step-by-step walkthroughs — serine proteases, PLP, TPP, kinases, aldolases — one electron push at a time. PLAY — THE BONUS: A CLINICAL MYSTERY • Work the Night Service: seven floors of a hospital, from the nursery to the exercise lab. Patients arrive with a story — an infant who vomits after fruit juice, a runner with cola-colored urine — and your job is to find the enzyme that failed. • Read the Labs Yourself: order tests against a clock, a reagent budget, and one tube of blood that never refills. The instrument shows you the trace; it never tells you what it means. Misread it, and the wrong number goes in the file. • Place the Block: pin a block on one step of the pathway board and see what the body would do — what piles up, what runs out. When it matches the labs, you call the attending. Three answers, one phone call, no partial credit. • A Hospital with Secrets: every floor has its own story — a swapped formula lot, a visitor after hours, a signature from a clinic that closed last year. Look around, ask the right person, and find out. Free to try. One purchase unlocks everything — no subscriptions, no microtransactions.