blank reactions were often breakdown molecules from food or storage.

Answer 1

It sounds like you are referring to catabolic reactions. Catabolic reactions are metabolic processes that involve the breakdown of complex molecules into simpler ones, often releasing energy in the process. In the context of food, catabolism helps to convert the energy stored in food molecules (like carbohydrates, fats, and proteins) into usable energy for the body's cellular functions. These reactions play a crucial role in metabolism and are essential for maintaining energy balance in living organisms.