The most extensively studied organisms in this context is the baker's yeast, Saccharomyces cerevisiae!
Baker's yeast has served as a model organism for studying many cellular processes, including oxidative phosphorylation, due to its simple genetics, well-understood biology, and similarity to higher eukaryotes in many fundamental cellular processes. By using baker's yeast as a model, scientists have been able to unravel key components and mechanisms involved in oxidative phosphorylation, including the electron transport chain, ATP synthase, and the generation of reactive oxygen species.
