What percentage of the adenosine triphosphate made during glucose catabolism is generated by chemiosmosis?
AAbout 10 percent
BAbout 30 percent
CAbout 50 percent
DAbout 90 percent
Answer & Solution
Correct answer: D. About 90 percent
1. Only a few molecules of adenosine triphosphate come directly from the chemical steps of the pathways.
2. The rest comes from chemiosmosis, a more complex process driven by a proton gradient.
3. Chemiosmosis generates 90 percent of the adenosine triphosphate made during glucose catabolism.
4. The same process powers the light reactions of photosynthesis, so it is not a respiration-only trick.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 7 "Cellular Respiration", section 7.1 Energy in Living Systems_
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