ccording to the Second Law of Thermodynamics, a spontaneous changeA. is always accompanied by an increase in the entropy of the universe. B.is always accompanied by an increase in the free energy of the system. C.is always accompanied by an increase in the entropy of the surroundings. D.is always accompanied by an increase in the entropy of the system. E.can only be carried out at a high temperature.

Effect of rotenone and antimycin a on electron transfer rotenone, a toxic natural product from plants, strongly inhibits nadh dehydrogenase of insect and fish mitochondria. antimycin a, a toxic antibiotic, strongly inhibits the oxidation of ubiquinol. (a) explain why rotenone ingestion is lethal to some insect and fish species. (b) explain why antimycin a is a poison. (c) given that rotenone and antimycin a are equally effective in blocking their respective sites in the electron-transfer chain, which would be a more potent poison? explain.