Genes act by directing the formation of

Specific enzymes
Enzymes are responsible for many activities that partake in the cell.
RNA or the ribonucleic acid is very important to the cell because the RNA is the only element that can enable a cell to make use of the instructions in the DNA in the process of producing enzymes which the body needs to function everyday.

Alright, i'm gonna try to explain this as good as possible. the law of conservation is like a collection overtime. it never changes though. no matter how you change the constituent parts.

They are both used to view parts of the cell