Suppose NAD+ is unavailable due to a mutation in the NADH dehydrogenase (Complex I).

If FAD could substitute, how would this affect the total ATP produced by the complete oxidation of glucose?

How would it affect the total ATP produced by the complete oxidation of a 20C fatty acid? (Give specific numbers and show how you reached this number.)

Based on what you know about redox potentials, would this be possible?

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.

i believe this is true, if you're asking for whether its true or false. : )