The electron transport chain explained "simply" Inside your mitochondria, the ETC is where most of your energy (ATP) is made. It works like an assembly line, passing electrons down a chain and pumping protons to build up energy. 1️⃣ Electrons Enter the Chain NADH and FADH₂ (from glycolysis and the Krebs cycle) donate electrons into Complex I and Complex II. 🟢 Example: These are like charged batteries delivering energy into the system. 2️⃣ Coenzyme Q (Ubiquinone) Transfers Electrons Electrons move from Complex I & II to Complex III via CoQ10. 🟢 Example: CoQ10 supplements support this step, which is why they’re often linked to energy production. 3️⃣ Cytochrome C Passes Them On From Complex III, electrons hop to Complex IV via cytochrome c. 🟢 Example: Think of cytochrome c as a courier shuttling electrons across the chain. 4️⃣ Proton Pumping Builds a Gradient As electrons move through the complexes, protons (H⁺) are pumped into the intermembrane space, creating a gradien...