elect the correct R or S designation for the stereocenter carbon atom in the molecule. A central carbon is bonded to an isopropyl group on top, an ethyl group to the bottom right. On the left, it is also bonded to a straight propyl chain via a wedged bond and to a methyl group via a dashed bond. The stereochemistry is: R S none of the above

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.