The Cell Is a Converter, Not a Generator

No cell has ever made a joule. Every scrap of energy your muscles spend arrived as sunlight, got packed into a sugar, got shuttled through ATP, and will leave as heat — transformed at every step, created at none of them. Watch the books balance. Then watch the sentence that costs more marks than any other in Unit 3 — “breaking ATP’s bond releases the stored energy” — get taken apart and put back the right way round.

AP BIOLOGY · 8 STEPS · 6 QUICK CHECKS · ENERGY TRANSFORMED, NEVER CREATED · ΔG < 0 = EXERGONIC · BREAKING A BOND COSTS · v1