The electron transport chain (ETC) is a series of protein complexes located in the inner 1. (..............................) membrane that is responsible for the final stages of cellular 2. (.................................). During this process, 3. (...................................) are transferred between protein complexes, which generates a proton gradient that is used to produce 4. (................................). Some well-known inhibitors of the ETC include malonate, antimycin A, and cyanide, each of which targets a specific protein 5. (..............................) in the chain. The use of ETC inhibitors has proven to be a powerful tool in understanding cellular respiration and its role in disease. Malonate is a competitive inhibitor of succinate dehydrogenase (SDH), which means that it binds to the same active site on the enzyme as the substrate, 6. (...............................). The binding of malonate to the active site of SDH prevents the transfer of electrons from succinate to 7. (...................................). From the experiment, antimycin A inhibits complex 8. (................................) and cyanide inhibits complex 9. (..................................) in ETC. The curve shows a greater decrease in DPIP with 10. (.................................) inhibitor suggested it is the strongest inhibitor in ETC.