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    Under no oxygen, yeast produce ethanol or lactic acid?

    Step 1 would be: pyruvate --> acetaldehyde + CO2 + NADH

    Step 2 would be: Acetaldehyde + NADH + H+ ---> Ethanol + NAD+

    is that right?
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    what would the metabolic reaction be for yeast with sufficient oxygen (so aerobic respiration is possible) but glucose is gradually decreasing.

    Does it undergo aerobic respiration or anaerobic respiration? Or what happens?
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    Yeast would produce ethanol, lactic acid is produced in the human body.

    the second question...I'm not sure but I think it would be aerobic till the glucose was over (because that's the limiting factor here; oxygen in sufficient) and then...it doesn't have any glucose so it couldn't do both because even anaerobic would need glucose.
 
 
 
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