2 Step 1: Glycolysis Where? In cytoplasm What happens? MitochondrionGlucoseC6H12O6CCATPATPCCEn-zymeCCWhere? In cytoplasmWhat happens?A) Glucose (from our food) is broken down into 2 pyruvate ( carbon molecules)B) 2 ATP molecules released for cellular processes
3 What’s after Glycolysis? Creates: 2 ATP & 2 Pyruvate (2 - 3 carbon molecules)Leads to either:Aerobic RespirationWith oxygen presentKreb’s CycleElectron transport chainAnaerobic RespirationWithout oxygenFermentationAllows glycolysis to restartglycolysisATPfermentationNo 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 muscle cells are not receiving O2Lactic acid waste createdB) Alcoholic fermentationPerformed by yeast, some plants, bacteriaAlcohol and 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 Aerobic Respiration Glycolysis Fermentation Where? In the mitochondriaSteps? Kreb’s cycle and electron transport chainWhat happens? 2 Pyruvate ( carbon molecules) create up to 36 ATPsWith oxygen presentGlycolysisWhere? In the cytoplasmWhat happens?Glucose is split into 2 Pyruvate ( carbon molecules)2 ATP createdIf oxygen is lackingFermentationWhere? In the cytoplasmWhat happens?Pyruvate ( carbon molecules) are broken into either lactic acid or alcoholMolecules to restart glycolysis created (No ATP)Glycolysis restarts
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9 Review 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?Which waste molecules are created by lactic acid fermentation?Is fermentation aerobic or anaerobic? What does this mean?Why is aerobic (cellular) respiration preferred vs. fermentation?
10 Review Answers Name the two types of fermentation. Lactic Acid and AlcoholicHow much ATP does glycolysis create?2 ATPHow much ATP does fermentation create?ZERO ATPWhich molecule is broken down during glycolysis?GlucoseA buildup of which molecule causes sore muscles?Lactic AcidWhich waste molecules are created by alcoholic fermentation?Alcohol and CO2Which waste molecules are created by lactic acid fermentation?Is fermentation aerobic or anaerobic? What does this mean?Anaerobic, which means the process does NOT require oxygenWhy is aerobic (cellular) respiration preferred vs. fermentation?Aerobic (cellular) respiration creates more ATP; specifically up to 36 ATP, while fermentation does not create any ATP, but allows glycolysis to continue.