How does the adenosine triphosphate yield from catabolising fructose or galactose compare with that from glucose?
AIt is impossible to compare
BIt is roughly half as much
CIt is exactly the same number
DIt is roughly twice as much
Answer & Solution
Correct answer: C. It is exactly the same number
1. Sugars other than glucose are fed into the glycolytic pathway for energy extraction.
2. The catabolism of both fructose and galactose produces the same number of adenosine triphosphate molecules as glucose.
3. They join a shared pathway, so the harvest from each is identical.
4. Halving or doubling the yield would require a different pathway, which is not what happens.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 7 "Cellular Respiration", section 7.6 Connections of Carbohydrate, Protein, and Lipid Metabolic Pathways_
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