Question

The fermentation pathways produce no more ATP beyond the small yield from glycolysis, but, the remaining reactions

• A. regenerate $NA{D}^{+}$
• B. regenerate ADP
• C. dump electrons on an inorganic substance (not oxygen)
• D. none of the above

Answer 1

Answer: (A)

regenerate $NA{D}^{+}$

• Fermentation pathway is the part of anaerobic reaction where the pyruvic acid is used in the absence of oxygen.
• The process of fermentation gives the cell with the end product of lactic acid or ethanol and carbon dioxide along with which a molecule of NAD is regenrated from NAD.
• The yeild of ATP from the anaerobic reaction is just the ATP that are produced from the Glycolysis reactions.
• Therefore the answer 'regenerate NAD+' is correct.