Other polar molecules include nucleic acids and some proteins. look at the dna sketch provided and predict how the two strands are attracted to one another. !

Thank you for posting your question here. I belive you are referring to the image attached. The two strands are attracted to one another since that one strand slightly positive are while the other one strand slightly negative area. Hope it helps. 

Aneutral atom must have the same number of neutrons and protons? no, they must have the same number of protons and electrons

Answer:

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

explanation:

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.