Chemiosmosis accounts for roughly what share of the ATP made during glucose catabolism?

1. Only a small number of ATP come directly from substrate-level phosphorylation. 2. The rest are made as hydrogen ions flow back through ATP synthase. 3. Chemiosmosis is used to generate 90 percent of the ATP made during glucose catabolism. 4. The same method is used in the light reactions of photosynthesis to harness the energy of sunlight. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 7 'Cellular Respiration', sections 7.1-7.7_