2 Step 1: Glycolysis Where? In cytoplasm What happens? MitochondriaGlucoseC6H12O6CCATPATPCCEn-zymeCCWhere? In cytoplasmWhat happens?A) Glucose (from our food) is broken down into 2 pyruvatesB) 2 ATP molecules released for cellular processes
3 What’s after Glycolysis? ATPfermentationNo O2O2ATP
4 Step 2: FermentationDuring prolonged exercise, the oxygen you inhale mainly goes to your brain. Your muscles are now lacking oxygen.Yeast perform alcoholic fermentation to make bread. Why isn’t bread alcoholic?How to relieve sore muscles:MassageBananasStretch afterHydrateAlcohol evaporates in the baking processMuscle cells perform fermentation to keep you going!Two Types of Fermentation (both anaerobic):A) Lactic Acid fermentationPerformed by animals when muscles are not receiving oxygenLactic acid waste createdB) Alcoholic fermentationPerformed by yeast, some plants, bacteriaAlcohol & CO2 waste created
5 Lactic Acid vs. Alcoholic Fermentation glycolysisglycolysisLactic acidAlcohol + CO2Lactic acid fermentationAlcoholic fermentationLactic AcidAlcoholicLocation: CytoplasmAmount of ATP created: ZeroThe Point? Make molecules to restart glycolysisWaste: Lactic acidLocation: CytoplasmAmount of ATP created: ZeroThe Point? Make molecules to restart glycolysisWaste: Alcohol and CO2
6 (anaerobic respiration) Where? In the mitochondriaSteps? Kreb’s cycle and electron transport chainWhat happens? Pyruvate converted into 34 ATPsWith oxygen presentGlycolysis:-- In the cytoplasm-- Glucose is split into 2 pyruvate-- 2 ATP createdIf oxygen is lackingFermentation(anaerobic respiration)Where? In the cytoplasmWhat happens?Pyruvate is broken into either lactic acid or alcoholMolecules to restart glycolysis created (No ATP)Glycolysis restarts
7 Recap Name the two types of fermentation. How much ATP does glycolysis create?How much ATP does fermentation create?Which molecule is broken down during glycolysis?A buildup of which molecule causes sore muscles?Which waste molecules are created by alcoholic fermentation?Is fermentation aerobic or anaerobic? What does this mean?Why is aerobic respiration preferred vs. fermentation?