Anaerobic respiration

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1
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what happens in the absence of oxygen

  • krebs cycle and ETC cannot occur

  • pyruvate builds up in cell cytoplasm


2
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explain what happens after glycolysis if respiration is anaerobic

  • pyruvate converted to lactate (animals/bacteria) or ethanol (yeast/plants)

  • oxidising reduced NAD, so NAD regenerated

  • so glycolysisi can continue (needs NAD), allowing continued production of ATP


3
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why does anaerobic respiration produce less ATP per molecule of glucose than aerobic respiration

  • only glycolysis involved- produces little ATP (2)

  • no oxidative phosphorylation- forms majority of AT (34)


4
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