Fermantation question

[jjw822]

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after the fermantation is done, how many ATPs are produced?? i know that 2 ATP is produced after the glycolysis and 2 ATP is produced after fermentation. So is total # of ATP produced is 4? or does 2ATP from glycolysis used up for fermanatation ????

 

[MattH25]

Glycolysis is fermentation (ok their end products are different)...it's just semantics. Glycolysis refers to processes in living cells while fermentation refers to bacterial glycolysis. In either case it produces 4 ATP but since 2 are consumed in the processing the net is 2 ATP.

 

[TheWiredNerv]

Fermentation is anaerobic respiration. It can occur in both eukaryotes and prokaryotes. As stated before, the 4 total ATP are produced during glycolysis. Fermentation doesn't consume ATP. NADH is converted to NAD+ in order to obtain lactate or ethanol ( depending on the organism) from pyruvate. This regenerates NAD+ so it can be used in glycolysis again to obtain the two net ATP.