There is no such thing as "food molecules".
Spicy food derives its "heat" from the presence of reactive molecules in the food, such as capsacin. The amount of heat is proportional to the volume of these molecules as well as the various types of the molecules.
Enzymes are the molecules responsible for catalyzing biochemical reactions, including the breakdown of food molecules. They act as biological catalysts by lowering the activation energy required for these reactions to occur.
This question is quite difficult to follow. Energy cannot change into molecules, food or otherwise. If you mean which types of food are good stores of energy, carbohydrates and fats are used for this.
fats, carbs and proteins
Different types of muscle contractions
Heterotrophs consume other organisms. Autotrophs use outside energy to make food molecules.
The three main types of molecules in food that provide us with energy are carbohydrates, proteins, and fats. Carbohydrates are the body's preferred source of energy, while proteins and fats play important roles in energy production and storage.
All types of molecules
All types of molecules
Food molecules are pieces of food broken up by acid juices in the digestive system.
diestive
Stomach acid