Respiration 8 anaerobic respiration

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Respiration 8 anaerobic respiration

  1. 1. Anaerobic respiration (s) explain why the theoretical maximum yield of ATP per molecule of glucose is rarely, if ever, achieved in aerobic respiration; (t) explain why anaerobic respiration produces a much lower yield of ATP than aerobic respiration; (u) compare and contrast anaerobic respiration in mammals and in yeast;
  2. 2. Sweet, Dry and Fortified Wine
  3. 3. Some protons leak across the mitochondrial membrane, reducing the number of protons to generate the proton motive force Some ATP is used for the shuttle to bring Hydrogen from reduced NAD made during glycolysis, in the cytoplasm, into the mitochondria Some ATP produced is used to actively transport pyruvate into the mitochondria
  4. 4. Anaerobic respiration… • Lactic fermentation • Alcohol / ethanoic fermentation
  5. 5. LACTATE FERMENTATION: Pyruvate is reduced to lactate Red NAD used to produce ATP ALCOHOLIC FERMENTATION: Pyruvate is decarboxylated and dehydrogenated to ethanol
  6. 6. Summary test… In the absence of oxygen neither the Krebs cycle or (1) can take place, leaving only glycolysis as a source of ATP. To allow glycolysis to continue, the hydrogen attached to (2) must be removed. In microorganisms such as (3) this is achieved by first removing (4) from pyruvate to form ethanal and then reducing it with hydrogen to form (5) in a process called (6) fermentation. Animals use a different form of fermentation in which pyruvate accepts hydrogen to form (7). Anaerobic respiration yields far less energy with only a total of (8) ATP being made from each glucose molecule as opposed to a total of (9) ATP in aerobic respiration. When immediate supplies of carbohydrates such as (10) stored in the liver have been used up, organisms will release energy by first metabolising (11) and then as a last resort (12).

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