Labeling Studies in Isolated Mitochondria The meta-bolic pathways of organic compounds have often been deline-ated by using a radioactively labeled substrate and following the fate of the label.(a) How can you determine whether glucose added to a suspension of isolated mitochondria is metabolized to CO2 and H2O

b

explanation:

which

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.