A jar of canned beans spoils; when you open the jar, the beans are putrid and rotten. There are billions of bacteria in the jar. Applying Cell Theory, what happened? All of these are possibilities according to the Cell Theory.
Bacteria formed from nonliving components, especially amino acids, present in the jar of beans.
Bacteria got in through a leak or else they were not all killed by the canning process. They then reproduced within the jar.
DNA from the beans recombined to create new bacterial cells.

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.