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Cellular Respiration

Cellular Respiration - Cellular Respiration/Metabolism How...

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Unformatted text preview: Cellular Respiration/Metabolism How cells make ATP What's cellular respiration? cells use sugars to make ATP ATP cell's energy source Location 1. 2. Cells Some rxns in cytoplasm Some rxns in mitochondria Mitochondria Structure Outer membrane Inner membrane forms folds cristae Matrix inside inner membrane E Carriers NAD FAD Equation C6H12O6 (glucose) + O2 CO2 + H2O + ATP + heat Aerobic uses O2 Anaerobic no O2 Glycolysis cytoplasm of cell Glyco = Lysis = To Start Glycolysis 2 ATP molecules Glucose enzymes Products of Glycolysis ATP NADH carries high energy eH2O Pyruvate high energy molecule 3 routes of Pyruvate organism anaerobic or aerobic Alcoholic Fermentation 1. 2. anaerobic conditions Yeast cells CO2 ethanol Alcoholic fermentation How stuffworks.com Ciaprofchef.com Lactic Acid Fermentation Bacteria 1. Lactic acid Lactic Acid Fermentation Foodsubs.com muscle cells Not enough O2, incurs O2 debt Pyruvate > lactic acid by muscle cells Dpawsey.tripod.com Krebs or Citric Acid Cycle Sir Hans Krebs - 1930's Nobel Prize conditions Aerobic mitochondria Enzyme - mediated Molecules to start cycle 1. 2. Acetyl CoA oxaloacetate Products of Krebs Cycle ATP CO2 gas NADH FADH2 E- Transport System NADH & FADH2 to ETS cytochromes accepts & gives away e O2 takes H+ off of NADH & FADH2 releases high energy eE- enters ETS O2 - final e- acceptor Forms H2O Energy in estored in ATP chemiosmosis Chemiosmosis 1. 2. 3. Pumping of H+ across inner membrane H+ rushes back across membrane, releasing energy ATP synthase molecules makes ATP Chemiosmosis Wikipedia.com Tidbits Gas chamber CO poisoning Efficiency of cellular resp Most efficient 40% of energy in glucose > ATP 60% of energy in glucose? Staff.jccc.net ...
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