Aliens land. You find out that in almost all ways, their metabolism is similar to that of humans. One significant difference is that they don't use NAD/NADH. At each and every step in the oxidation of biological molecules where humans use NAD/NADH aliens use FAD/FADH-2. At steps where humans use FAD/FADH-2 the aliens do as well.
a) Who makes more ATP or mole of glucose, aliens or humans? Describe.
b) Who makes more ATP through substrate level phosphorylation?