Question

A process that depends on a specific molecule from the food we eat to serve as fuel (source of energy)

Answer 1

Suppose I am taking protein as the specific molecule(macromolecule) from the food we eat to serve as fuel(Source of energy). So, the process of protein makes energy in our body--

1) Provides energy in late stages of prolonged exercise - When muscle glycogen stores fall, as commonly occurs in the latter stages of endurance activities, the body breaks down amino acids found in skeletal muscle protein into glucose to supply up to 15 percent of the energy needed.

2) Provides energy when the daily diet is inadequate in total calories or carbohydrate-In this situation, the body is forced to rely on protein to meet its energy needs, leading to the breakdown of lean muscle mass.