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Glycolysis Cellular Respiration End Goal: Transfer energy from bonds in glucose into ATP Three Steps: • Glycolysis • Krebs Cycle • Electron Transport Chain Why so many steps? • All at once = energy wasted as heat • Gradual breakdown = keep more energy • Glyco = sugar • Lysis = split Glycolysis • Takes place in the cytosol • Glucose is oxidized in ten steps (helped by 10 enzymes!) • End products are 2 pyruvate molecules, ATP, and NADH Glycolysis • 2 Phases of glycolysis: • Energy “Investment” Phase: 2 ATP molecules used (“spent”) • Energy “Payoff” Phase: 4 ATP molecules and 2 NADH are made • What is the net product of glycolysis? Glycolysis Video • https://www.youtube.com/watch?v=3GTjQTqUuOw
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