45. Fermentation is essentially glycolysis plus an extra step in which pyruvic acid is reduced to form lactic acid or alcohol ; and carbon dioxide. This last step 養
(A) removes poisonous oxygen from the environment
(B) extracts a bit more energy from glucose [
(C) enables the cell to recycle NAD+
(D) inactivates toxic pyruvic acid
(E) enables the cell to make pyruvic acid 奪 into substances it can use [
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