Answer: Chemiosmosis
Explanation
Photosynthesis and respiration generate ATP by thesame mechanism, Chemiosmosis. In plants cells it occurs in the chroplast and mitochondrial in animal cells. An electron transport chain is assembled in a membrane pumps protons across the membrane as electrons are passed through a series of carriers that are progressively more electronegative.
In both kinds chloroplasts and mitochondrial electron transport chain pump protons (H+) across a membrane from a region of low (H+) concentration to high H+ concentration. The protons then diffuse back across the membrane through ATP synthase, driving the synthesis of ATP.
