What is Cellular Respiration? When organisms release the _________ stored in carbohydrates and other food molecules energy Sucrose: A disaccharide GlucoseFructose Monosaccharides 3 stages of Cellular Respiration 1.Glycolysis: Occurs in the cytoplasm No O 2 required 2.Krebs Cycle: Occurs in the mitochondrion 3.Electron Transport Chain Requires O 2 Aerobic Respiration 1.Occurs when Oxygen is present 2.Many ATP Molecules made Anaerobic Respiration 1.Occurs when no Oxygen is present 2.Very little ATP made 3.Two basic types: a.Fermentation: Alcohol and CO 2 produced b.Lactic Acid Glyco lysis literally means sugar splitting ATP PP ADP ATP = -2 P P Glycolysis takes place in the cytoplasm PP NAD + NADH = +2 P P Glycolysis takes place in the cytoplasm PP ADP ATP ATP ATP = +2 Glycolysis takes place in the cytoplasm P P ADP ATP ATP ATP = +2 Pyruvate What is the net gain of energy in Glycolysis? ATP = + 2 NADH = + 2 Moving on to the Krebs Cycle Enjoy this video clip, and jot down a summary of Krebs and Chances research. Pay attention to the significance of both scientists discoveries. Label the parts of the mitochondrion Inner membrane Outer membrane Cristae Matrix Inter- membrane space The Krebs Cycle takes place in the Matrix of the Mitochondrion NAD + NADH CoA Acetyl CoA The Krebs Cycle takes place in the Matrix of the Mitochondrion CoA Citrate The Krebs Cycle takes place in the Mitochondrion NAD + NADH The Krebs Cycle takes place in the Mitochondrion NAD + NADH The Krebs Cycle takes place in the Mitochondrion P ADP ATP NADHNAD + The Krebs Cycle takes place in the Mitochondrion FADH FADH 2 What is gained and lost per pyruvate molecule? What is lost during the Krebs Cycle? A Carbon atom must be lost It is lost in the form of Carbon Dioxide There are 3 CO 2 molecules lost What is gained during the Krebs Cycle? 4 NADH molecules are made. 1 FADH 2 molecule is made 1 ATP molecule is made What is gained per glucose molecule? NADH = +4 ATP = +1 FADH 2 = +1 But there were two molecules of Acetyl CoA that went into the Krebs Cycle How many would be produced in this case? +8 +2 Where is the energy? So far, most of the usable energy from the original glucose molecule is stored in and Where will most of the ATP be made? The Electron Transport Chain NADHFADH 2 Where is the Electron Transport Chain? Inside the mitochondrion. Folds of the inner membrane known as cristae. Many ATP molecules will be produced in these Electron Transport Chains How much ATP can each electron carrier make? FADH 2 NADH FADH 2 ATP ATP ATP ATP ATP Oxygen is the final electron acceptor. Two Hydrogen ions attach, and H 2 O is formed. Hydrogen ions pump from the matrix to the inter- membrane space. This uneven distribution of ions is called a chemiosmotic gradient. C 6 H 12 O 6 ATP C 6 H 12 O 6 CO 2 H2OH2O ATP C 6 H 12 O 6 CO 2 H2OH2OO2O2 ATP +++ With a neighbor, fill in the steps in this cycle of Photosynthesis and Respiration. We will check your answers when you are done! Photosynthesis and Respiration