Which two cellular structures work together to synthesize, modify, and transport macromolecules within the cell?.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

i'm assuming that it's c.) red bank..

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

i think that the answer is c