The Metabolic Processes Called Fermentation

Question

The metabolic processes called fermentation
A) produce substrates for the Krebs cycle.
B) are alternatives for the pentose phosphate pathway.
C) use an organic molecule as a final electron acceptor.
D) occur only when oxygen is readily available.
E) produce substrates for glycolysis.

Accepted Answer

Fermentation is a metabolic process that occurs in the absence of oxygen and uses an organic molecule, such as pyruvate, as a final electron acceptor. This allows for the regeneration of NAD+ (which is used in glycolysis) from NADH, thus allowing glycolysis to continue in the absence of oxygen. Fermentation does not produce substrates for the Krebs cycle or glycolysis, nor is it an alternative for the pentose phosphate pathway.