2 Cellular Respiration… Is a process that makes ATP by breaking down sugars (glucose).Cellular respiration is aerobic, or requires oxygen.Three Stages:GlycolysisKrebs CycleElectron Transport Chain
3 Cellular respiration takes place in the mitochondria!!!
4 Step 1: GLYCOLYSISMUST happen FIRST…REQUIRED for Cellular Respiration.Anaerobic process (does NOT require oxygen)Takes place in cytoplasmEnzymes split glucose into two three-carbon moleculesPyruvic AcidProduces two ATP molecules
5 Step 2: The Krebs CycleIs the first main part of cellular respiration.Produces molecules that carry energy to the second part of cellular respiration.
6 Stage 2: KREBS CYCLE (Aerobic Pathway) takes place in the matrix of the mitochondriabreaks down three-carbon molecules from glycolysis (Pyruvic Acid molecules)Regulated by enzymesMakes 2 molecules of ATPReleases carbon dioxideTransfers energy-carrying molecules to Electron Transport ChainNADH & FADH2
7 energy from glycolysis 6H O26CO6Omitochondrionmatrix (area enclosedby inner membrane)inner membraneATPenergyenergy from glycolysis43and
8 Step 3: The Electron Transport Chain Second main part of Cellular Respirationtakes place in the inner membrane of the mitochondriaUses energy from Krebs Cycle to drive electron transport chainOxygen enters process32-34 molecules of ATP producedwater released as a waste productFormed when enzyme combines hydrogen and oxygen
9 energy from glycolysis 6H O26CO6Omitochondrionmatrix (area enclosedby inner membrane)inner membraneATPenergyenergy from glycolysis143and
10 Products of Cellular Respiration-including Glycolysis 6 molecules Carbon dioxide from the Krebs cycle and Glycolysis6 molecules of water from the electron transport chainA net gain of up to 38 ATP molecules for every glucose molecule2 from glycolysis2 from the Krebs cycle32-34 from the electron transport chain
11 Glucose + Oxygen Carbon dioxide + Water + Energy The equation for the overall process of Cellular Respiration is:C6H12O6 + 6O2 6CO2 + 6H2O + ATPGlucose + Oxygen Carbon dioxide + Water + Energy
12 Relationship between Photosynthesis & Cellular Respiration: The reactants in photosynthesis are the same as the products of cellular respiration.