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Anaerobic Respiration

Aida Rogonich , Cristina Botello , Jacqueline Enriquez, Sarah Wolberg , Takira. Anaerobic Respiration. Alcohol fermentation: Step One . Glycolysis is the breaking of a carbohydrate into two pyruvates Occurs in the cytoplasm of cells No oxygen needed. . Glycolysis: Part one.

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Anaerobic Respiration

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  1. Aida Rogonich, Cristina Botello, Jacqueline Enriquez, Sarah Wolberg, Takira Anaerobic Respiration

  2. Alcohol fermentation: Step One • Glycolysis is the breaking of a carbohydrate into two pyruvates • Occurs in the cytoplasm of cells • No oxygen needed.

  3. Glycolysis: Part one • 2 PGAL’s (Phosphoglyceraldehyde - 3Carbon molecules) are formed from the breaking down of glucose (6C) • Two ATP's are required

  4. After glycolysis

  5. Glycolysis: Part two • 2 pyruvates are created from 2 PGAL's (3C) • Producing 4 ATP's and 2 NADH's • Net production = 2ATP’s and 3 NADH’s

  6. In the cytosol of YEAST! Where does it occur? No oxygen is used 2 Acetaldehyde is reduced by NADH to ethanol Regenerating supply of NAD+ Carbon dioxide may be realeased Glycolysis continues 2nd Step

  7. When the first step occurs and 2 acetaldehyde is formed, 2 CO₂ is released Then acetaldehyde accepts hydrogen and electrons from the 2 NADH formed through Glycolysis With the combining of e-, H+, and 2 acetaldehyde, 2 NAD+ is regenerated and 2ethanol is created 2nd Step Cont.

  8. Lactic Acid Fermentation: Alcoholic Fermentation: Glucose + 2 ADP + 2 Pі 2 ethanol + 2 CO₂ + 2 ATP + 2 H₂O OR C₆H₁₂O₆  2 C₂H₅OH + 2 CO2 • Glucose + 2 ADP + 2 Pi  2 lactate + ATP + 2 H₂O Alcoholic Fermentation Equation

  9. Summarization of Fermentationhttp://trc.ucdavis.edu/biosci10v/bis10v/media/ch06/fermentation.swf

  10. What organisms use lactic acid fermentation? • Fermented vegetables • Pickles! • The sugars in the pickles are converted to lactic acid, preserving the pickle • Lactobacillus bulgaricus – a bacteria • Yogurt • Lactose is fermented by the bacteria to lactic acid, which both thickens the yogurt and restricts the growth of bacteria that poisons the food • Humans • during anaerobic exercise • lactic acid is fermented in muscles where oxygen is depleted • makes muscles burn

  11. http://www.icr.org/article/172/ http://trc.ucdavis.edu/biosci10v/bis10v/media/ch06/fermentation.swf http://www.bio.miami.edu/~cmallery/255/255atp/mcb8.5.fermentation.jpg Resources

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