text: in chemiosmosis, atp is produced when? a. a high-energy phosphate group is passed from glucose 6-phosphate to adp.  b. hydrogen ions are bound to nad and fad.  c. pyruvic acid is converted to an acetyl unit.  d. hydrogen ions diffuse into the mitochondrial matrix.  e. glucose is transported across the cell membrane. d.  as the protons flow back into the matrix of the mitochondrion via atp synthase this flow provides enough energy for adp to combine with inorganic phosphate to form atp.