1.18 cellular respiration pages 77-82. cellular respiration glucose + oxygen gas carbon dioxide +...
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1.18 Cellular Respiration
Pages 77-82
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Cellular Respiration
glucose + oxygen gas carbon dioxide + water + ATP energy
C6H12O6 + 6 O2 6 CO2 + 6 H2O + ATP energy
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Aerobic Cellular Respiration
• uses oxygen• produces large amounts of ATP
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Anaerobic Respiration
• does not use oxygen• produces small amounts of ATP
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Step 1: glycolysis
• Glycolysis: 10 enzyme-catalyzed reactions occur in the cytoplasm
• One glucose two molecules of pyruvate• Energy released produces 2 ATP
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Step 2: oxidative respiration
• 2 pyruvate move into the matrix of the mitochondrion broken down into 6 CO2 and
6 H2O .• Produces 34 molecules of ATP
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Mitochondria
• Site of ATP energy production• Mitochondria have their own DNA
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Anaerobic Respiration
• Ethanol fermentation• Lacate (lactic acid) fermentation
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Ethanol
glucose 2 pyruvate + 2 ATP
Cytoplasm enzyme “pyruvate decarboxylase” removes CO2 ethanol
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Ethanol Fermentation
• Beer making• Bread making• Wine making
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Lactate (lactic acid) fermentation
• Strenuous exercise• Glucose 2 pyruvate + 2 ATP 2 lactate• Enzyme in cytoplasm “lactate dehydrogenase”
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Lactate in muscles
• Pain• Stiffness• fatique