Which phrase best describes dna?
a. the structure that sends signals to other parts of the cell
b. the structure directly responsible for controlling osmosis
c. the molecule that contains all the instructions for life
d. the molecule that is formed by the action of rna

Well, the DNA is sort of like a code that tells all of the other cells and structures what to do, when to grow, reproduce, split, stuff like that. So, I would say the most likely asnwer would be C, because it is not only responsible for osmosis, it is not formed by RNA, RNA is a split DNA strand, and it is a structure that sends signals to other parts of cells. So the most likely answer would be C>