Ons of the elements oxygen (O), sulfur (S), and selenium (Se) usually have charges of 2-. Ions of the elements fluorine (F), chlorine (Cl), and bromine (Br) usually have charges of 1-. This demonstrates that

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.