Answer:
During chemical reactions, the bonds that hold molecules together break apart and form new bonds, rearranging atoms into different substances. Each bond requires a distinct amount of energy to either break or form; without this energy, the reaction cannot take place, and the reactants remain as they were
Explanation:
I believe the answer to your question is A
Answer:
mitochondria
Explanation:
chemical reactions take place here to transfer molecules into ATP an easily usable energy source for many bodily processes