ON A TEST
In which of the following ways does a virus resemble cellular organisms? (a) They divide by mitosis. (b) Their genetic material uses the same genetic code. (c) They can grow on artificial media. (d) They have mitochondria for aerobic respiration.

(b) Their genetic material uses the same genetic code.

make   gliitsh plesea   !

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.