Question

fermentation reactions
completely oxidize glucose to carbon dioxide and water
often require the reactions of glycolysis to provide energy as atp
supply nad+ for the oxidation of glucose
operate in the presence of oxygen
two of the above are correct

Explanation:

Fermentation is an anaerobic process, so it does not operate in the presence of oxygen. It partially oxidizes glucose and regenerates NAD+ for glycolysis to continue. Glycolysis is the first - stage of glucose breakdown to produce ATP. Fermentation does not completely oxidize glucose to carbon dioxide and water like aerobic respiration. It supplies NAD+ for glycolysis to keep generating some energy as ATP.

Answer:

supply NAD+ for the oxidation of glucose, often require the reactions of glycolysis to provide energy as ATP