What is Cellular Respiration?  The process whereby cells convert carbohydrates to energy in the form of ATP (energy storage molecule)  All cells undergo

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  • What is Cellular Respiration?The process whereby cells convert carbohydrates to energy in the form of ATP (energy storage molecule)All cells undergo respiration Aerobic respiration is the most efficient method, yielding the greatest amount of ATP per glucose moleculeAnaerobic respiration is less efficient but provides a method for getting energy (ATP) in the absence of oxygen

  • Aerobic Cellular Respiration Equation

    C6H12O6 + 6O2 6CO2 + 6H2O + energy (glucose)(oxygen) (carbon dioxide) (water)

    Does this equation look familiar?

    It is the reverse of the photosynthesis equation.

  • Aerobic Cellular Respiration:Respiration in the Presence of OxygenTwo Main Parts1st Part: Anaerobic ProcessGlycolysisin cytoplasm

    2nd Part: Aerobic ProcessesKrebs CycleElectron Transport Chainin mitochondrion

  • Aerobic Cellular Respiration

    Three steps: GlycolysisKrebs Cycle ETC (Electron Transport Chain)

  • Glycolysisglycolysis is an anaerobic process, meaning it does NOT require oxygenoccurs in the cytoplasmglucose is broken down into pyruvateyields 2 molecules of ATP2 molecules

  • Krebs Cycleaerobic metabolic process, meaning it REQUIRES oxygenalso known as the Citric Acid Cycleoccurs in the mitochondriontakes the product of glycolysis and converts it to carbon dioxideyields 2 molecules of ATP6CO22 molecules

  • Electron Transport Chainaerobic metabolic processoccurs in the mitochondrionreleases the greatest amount of ATPyields about 34 molecules of ATP 34 molecules

  • glucose+ oxygencarbon dioxide+ waterphotosynthesis & cellular respiration are cyclic processesthe products of one are the reactants of the other

  • Anaerobic Cellular Respiration:Respiration in the Absence of Oxygen

    = Glycolysis + Fermentationallows cells to produce ATP WITHOUT OXYGENno ETC is present (recall how many ATP molecules are created by the electron transport chain = ___ ATP)method used by anaerobic bacteriamethod used by organisms which ordinarily undergo aerobic respiration when there is no oxygen present


  • Glycolysis + FermentationIn the absence of oxygen, the product of glycolysis (pyruvate) enters into the fermentation pathway Two pathways (pathway is dependent on the organism)Alcoholic fermentationLactic acid

  • Fermentation

  • Alcoholic Fermentationyeast undergo alcoholic fermentationglucose is converted to ethanol & carbon dioxide yields 2 ATP moleculesapplicationsCO2 makes bread risebrewing beerwinemakingethanol fuel

  • Lactic Acid Fermentationglucose is converted to lactatesome bacteria undergo lactic acid fermentationapplications = yogurt, sauerkraut, kimchi

    muscle cells can continue to produce ATP when oxygen runs low but muscle fatigue and pain may resultfast twitch muscles for sprinting white meat in poultry

  • Summarize: 3-2-13 Steps of Aerobic Cellular Respiration

    2 Types of Fermentation

    1 Main Goal of Cellular Respiration


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