What percentage of the adenosine triphosphate made during glucose catabolism is generated by chemiosmosis?

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_