Which best relates cells and viruses? 1. Viruses grow and reproduce like cells.
2. Cells can infect specific host viruses.
3. RNA is found in cells, but not in viruses.
4. Viruses can infect certain cells.

Viruses can infect certain certain cells

Explanation:

Viruses main purpose is to infect cells.

Viruses can infect certain certain cells

Explanation:

unit test on edge2020

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.