how much ATP is produced Most facultative anaerobic organisms that produce ethan

Question

how much ATP is produced

Most facultative anaerobic organisms that produce ethanol as a product use the glycolysis pathway followed by alcohol fermentation to produce ATP from glucose. The laboratory you work for has discovered an organism called E. hugdahlis that uses several reactions not found in the typical glycolysis pathway (reaction 1, reaction 2, and reaction 3 on the figure below). Only the three specified reactions utilize new enzymes, all other reactions utilize identical enzymes to typical glycolysis and alcohol fermentation. The new pathway is shown below.

Explanation / Answer

5 ATPs are produced because all the reaction are same except the 1,2 and 3. And typical anaerobic reaction produces 2 ATPs but here the reaction 1produces an extra NADH and that produces 3 ATPs from the non oxygen carrier. So total of the 5 ATPs are produced.

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