22When glucose gets into a cell, GLYCOLYSIS breaks it down. occurs in the cytoplasm.chemical reactions use enzymesanaerobic reaction = No Oxygen needed!net yield 2 pyruvate from 1 glucose moleculemakes 4 ATP, but uses 2 ATP so it Releases only 2 ATP!
26Overview of cellular respiration mitochondrionCellular Respiration overview, focus on ETC
27Aerobic RespirationPyruvate from glycolysis is converted by enzymes to acetyl CoA which enters the mitochondrial matrix.Krebs cycle (Citric Acid cycle): Chemical reactions use enzymes.in mitochondrial matrixmakes 2CO2, 1 ATP, 3 NADH, 1 FADH2
30Electron Transport Chain Last step of aerobic respirationHappens across inner mitochondrial membrane.High energy electrons and H+ from NADH and FADH2 in Krebs convert ADP to ATP through chemiosmosis.Overall, makes 34 ATP from one glucose molecule!!!Electron Transport Chain
34Anaerobic Respiration If oxygen is not available, regenerates NAD+ for glycolysisoccurs in cytoplasm2 types of fermentation:lactic acid fermentation (animals)pyruvate to lactic acidstrenuous exercise = sore muscles!alcohol fermentation (yeast, bacteria)yeast and some bacteriapyruvate to ethyl alcoholAnaerobic Respiration