a – chap. 9 page 220 c 6 h 12 o 6 c 6 h 12 o 6 + 6o 2 6o 2 → 6co 2 6co 2 + 6h 2 o 6h 2 o + atp
TRANSCRIPT
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A Chap. 9Page 220C6H12O6 + 6O2 6CO2 + 6H2O + ATP
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Where does it happen?MitochondriaHow does it happen?3 Steps . . .
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3. The ELECTRON TRANSPORT CHAIN (ETC)1. GLYCOLYSIS2. The KREBS CYCLE!
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1. Glycolysis--Takes place in the cytoplasm of cells--Breaks glucose (6-carbon) into two smaller compounds of Pyruvic Acid (3-carbon) and produces 2 ATP2 pyruvic acid molecules1 glucose
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2. The Krebs CycleIf OXYGEN is present (aerobic) . . .then . . .--Takes place in mitochondria matrix--In this cycle, 3-carbon compound (pyruvic acid) and Oxygen are converted to CO2 , 2 ATP, and lots of high energy electrons
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Image taken from www.sp.uconn.edu
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3. Electron Transport ChainTakes place in inner membrane of mitochondriaHigh Energy electrons (from Krebs) are passed through a chain producing LOTS + LOTS + LOTS + LOTS of ATP (34)
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What if after glycolysis, there is NO oxygen????Anaerobic conditions lead to . . .Fermentation1. Alcoholic2. Lactic Acid***No more ATP produced after glycolysis
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SummaryGlucoseGlycolysisPyruvateFermentationEthanol & CO2LactateWithout O2With O2Krebs CycleETC(Net)2 ATP2 ATP34 ATP(Produces the greatest amount of ATP!)(Cells make a limited # of ATP)Alcoholic
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Summary
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SummarizingCellular RespirationC6H12O6 + 6O2 6CO2 + 6H2O + ATP
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Photosynthesis and Cellular Respiration CycleProducts of one become reactants of the other!
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Comparison of Photosynthesis vs. Cellular Respiration
PhotosynthesisCellular RespirationFunctionSunlight and Make GlucoseGlucose into EnergyLocationChloroplastMitochondriaCell TypePlant Cells, algaeALL Eukaryotes, some prokaryotesProcessesthat occurLight Reactions
Calvin Cycle- (Dark Reactions)Glycolysis or GlycolysisKrebs Cycle Fermentation ETCEquation6CO2 +6H2O C6H12O6 +6O2C6H12O6 +6O2 6CO2 +6H2O
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How much energy do we make?In Cellular RespirationAnaerobicGlycolysis- 2 ATPFermentation- 0 ATPTotal- 2ATPAerobic Glycolysis- 2 ATPKrebs Cycle- 2 ATPETC- 34 ATP Total- 38 ATP
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How do WE use Cellular Respiration?Quick EnergyEnough ATP to last about 50 meters in a race.Lactic- Acid Fermentation takes over to produce energyProduce energy for about 90 seconds.Long-Term EnergyExercise longer than 90 secondsExtra energy stored as carbohydrate glycogen for 15-20 minutes of energyLonger exercise body breaks down other stored molecules- mainly lipids.
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VIDEO of CELLULAR RESPIRATIONhttp://www.youtube.com/watch?v=fvgpf51ScuI