Chad's glycolysis Q

[Eri3]

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What is the hypothetical net yield of ATP from the breaking down of one molecule of glucose?
28
32 [Correct Answer]
40
26
34

The hypothetical net yield of ATP from the breaking down of one molecule of glucose is 32. Remember that this yield is not one that should be expected every time, but is rather a yield that can be potentially obtained. Typically this high yield is not attained. The word net refers to ATP generated (34) minus ATP used (2) = 32.

This total comes from using the most current values of 2.5ATP per NADH and 1.5 ATP per FADH2 rather than the historical values of 3 and 2 respectively. Using these older values would have given a net 36 ATP per glucose which was not an answer choice to avoid confusion.


Okay well what should we remember because every other source that i've read has said 36(eukaryotes) and 38 (prokaryotes)

 

[hope_to_match]

I asked this question not so long ago. Just know 36 net and 38 total 🙂

 

[Eri3]

I asked this question not so long ago. Just know 36 net and 38 total 🙂

okay cool. thanks 🙂

 

[JRod17]

I think this has to do with ATP per NADH and FADH2 molecules. The most recent ratio is 2.5 ATP per NADH and 1.5 per FADH2, which is the ratio in my biochem textbook. With these ratios, you would end up with a total of 32 ATP per glucose molecule. In other sources, including Cliff's, the ratio is 2 ATP per FADH2 and 3 ATP per NADH, thus 36 ATP per glucose molecule. In my biochem class, we learned 32, so I have been confused on this my entire studying process... I'll just go with 36, since that seems to be the answer on most practice tests.


NVM... All this is explained by Chad in the OP...