Presentation on theme: "“Getting Energy to Make ATP”"— Presentation transcript:
1 “Getting Energy to Make ATP” Cellular Respiration“Getting Energy to Make ATP”Section 9.3Pg
2 Cellular RespirationPlants and animals get glucose, but how do cells get energy from itCellular RespirationDefinition: the process by which mitochondria break down food molecules to produce ATPGlucose (6C) ATP’s2ATP 38 ATP’s (total produced = ???)
3 Cellular Respiration Three stages to cellular respiration Glycolysis Citric acid cycleElectron transport chain
4 Glycolysis Reaction occurs in the cytoplasm of a cell. Glucose (6C) 2 pyruvic acid (3C)Reaction does not need oxygen to occur (Anaerobic)
5 Glycolysis Three final products: NADH (2)ATP (2)Pyruvic acid (2)Two ATP needed for glycolysis and only four are made not efficient process to make ATP.
6 Citric Acid Cycle (or Krebs Cycle) Reaction takes place in the mitochondria of a cellTakes the pyruvic acid (3C) and makes 2 more ATP & 6 CO2Also makes many electron acceptors for final stageElectron carrier electron acceptorNAD- NADHFAD FADH2
7 Electron Transport Chain (final stage of cellular respiration) occurs in the inner membrane of the mitochondriaFrom the citric acid cycle, the electron carriers pass energized electrons along to the electron transport chainNADH and FADH2 pass energized electrons from protein to protein within the membrane, which release small amounts of energy
9 Electron Transport Chain ATP UsedATP madeGlycolysisCitric Acid CycleElectron Transport ChainTotal ATPTotal ATP produced
10 FermentationAnaerobic process that follows glycolysis when cell are without oxygen for a short period of time.Two major typesLactic acid fermentationAlcoholic fermentation
11 Lactic Acid Fermentation Definition: series of anaerobic chemical reactions in which pyruvic acid uses NADH to form lactic acid and NAD+, which is then used in glycolysis.You get only 2 ATP for one glucose moleculeLactic acid builds up in your muscles, and that is why your muscles ache when you over exercise.
12 Alcoholic Fermentation Definition: another type of fermentation that is used by, among others, yeast cells to produce CO2 and ethyl alcohol.Only producing 2 ATP molecules
13 Comparing Fermentation to Cellular Respiration Lactic AcidAlcoholicCellular RespirationGlucoseGlycolysis (pyruvic Acid)Lactic acid+2 ATPCO2AlcoholWater38 ATP
14 Comparing Photosynthesis and Cellular Respiration FoodCO2EnergyOxygenProduces …When does it happen?Occurs ?
15 Comparing Photosynthesis and Cellular Respiration Food accumulatedFood broken downCO2 taken inCO2 given offEnergy from sun stored in glucoseEnergy of glucose releasedOxygen given offOxygen taken inProduces glucose from PGALProduces CO2 and waterGoes on only in lightGoes on day and nightOccurs only in presence of chlorophyllOccurs in all living cells