Cellular RespirationEnergy From Food
What is Cellular Respiration ?Conversion of food/glucose into Energy (ATP) with oxygen present AEROBIC process= oxygen requiredOccurs in the mitochondria.
Tell your shoulder partner what the reactants and products are based on the pictures?What do you guess is the goal?
Whats the Equation?Chemical Equation: 6O2 + C6H12O66CO2 + 6H20 + ATP EnergyWord Form: Oxygen + Sugar Carbon dioxide + Water+ Energy (ATP)Reactants: sugar (glucose) and oxygen.Products: Carbon dioxide, water, and energy (ATP).
Where does it Take Place?MitochondriaThe cristae (folds of mitochondria) is where ATP is made3 separate reactions occur: Glycolysis, Krebs Cycle, Electron transport chain
What is Glycolysis? (Glucose Breaking)1st step occurs in cytosol and is anaerobic 1 molecule of Glucose broken in half= 2 of pyruvic acidMakes 2 molecules of ATPGlucose is starting molecule
ReviewExplain the role of organic (carbon based) compounds in CR. (p.131,132)For each 6 carbon molecule (C6H12O6), how many molecules of ATP are used and how many are produced? (p. 132,133)
What is the Krebs Cycle?2nd reaction of cellular respiration is aerobic/in mitochondriaBegins when pyruvic acid from glycolysis enters mitochondriaPyruvic acid converted to CO2(waste product) (pg. 138)Makes 2 moleules of ATP
The Krebs Cycle
Begins when pyruvic acid produced by glycolysis enters the mitochondrion.It is then turned to CO2 (waste product)And citric acid
Whats the Electron Transport Chain?3rd stage of cellular respiration is aerobic/in mitochondriaOccurs in the cristae (folded membranes of mitochondria)Uses the high-energy electrons from Krebs to convert ADP to ATP.Total ATP 32.Produces Water as waste product
The Totals (ATP)Glycolysis=2 ATPKrebs Cycle=2 ATPElectron Transport=32 ATPTOTAL= 36 ATP from 1 glucose molecule
Why Glucose into ATP? Its used to fuel/power cell activities1.) ATP releases energy in a controlled way compared to glucose(think controlled fire vs explosion)2.) ATP=immediate energy, glucose takes time
ATP = Adenosine Triphosphate = APPP high energy bonds
When a cell needs energy, high energy bonds are broken by an enzyme. + PAPPP APP (ATP) (ADP) energy
THE BIG PICTUREGlucose &
Comparing Photosynthesis and Cellular RespirationDefinition:
What type of cell/Organism:
Anaerobic vs. aerobic
Anaerobic means without oxygen (glycolysis)Produces little ATPIt is how our body makes most of the energy at the start of exercise
Aerobic means with oxygen (Krebs cycle and ETC) Produces 20 times more ATP than glycolysis aloneBody relies on it during extended physical activities
Normal Cellular Respiration
Lactic AcidPyruvic AcidLactic Acid Fermentation- Occurs in cytoplasm (anaerobic-no oxygen) and creates lactic instead of CO2 and H2O.
Lactic AcidPyruvic Acid