AP Biology Unit 3 Cellular Energetics: How Your Cells Actually Make Energy

Where does the energy in your body actually come from? Your cells recycle roughly your body weight in ATP every single day — this video traces every step of how that happens, from enzymes to photosynthesis to cellular respiration. In one video you'll learn: ✅ How enzymes work (active site, induced fit, activation energy) ✅ The 3 traps that catch even strong students — delta-G, oxygen-from-water, inhibition graphs ✅ Photosynthesis: light reactions, photolysis, and the Calvin cycle ✅ Cellular respiration: glycolysis, Krebs cycle, ETC & chemiosmosis ✅ Fermentation, and why energy is the currency of evolution 🧪 THE 3 EXAM TRAPS: 1. Enzymes do NOT change ΔG — they only lower activation energy 2. The O₂ you breathe comes from WATER (photolysis), not CO₂ 3. Competitive inhibition: Vmax recoverable. Noncompetitive: Vmax drops for good 💬 COMMENT QUESTION: Which trap would have caught YOU — the delta-G trap, the oxygen trap, or the inhibition graph? Tell me below — I answer every single comment! 📚 CHAPTERS: 00:00 Hook and roadmap 00:42 Enzyme structure and induced fit 01:28 Activation energy and the delta-G trap 02:19 Temperature, pH, denaturation 03:17 Inhibition and graph reading 04:16 ATP and coupled reactions 05:17 Redox and light reactions 06:18 Calvin cycle and the oxygen trap 07:14 Glycolysis, Krebs, ETC, chemiosmosis 08:18 Fermentation and fitness 09:10 Recap, traps, and your turn 🔔 Subscribe for daily AP prep — full chapter explainers for every AP Biology unit, trap breakdowns, and FRQ tips you won't learn in class. Next up: Unit 4 — Cell Communication. #APBiology #APBio #CellularEnergetics #Photosynthesis #CellularRespiration #APBiologyUnit3 🎯 Watch next: ▶ How Do Cells Talk — and Know When to Divide? Unit 4 in 11 Minutes:    • AP Biology Unit 4 in 11 Minutes: Cell Comm...   ▶ Full Unit 3 playlist:    • AP Biology Unit 3: Cellular Energetics