Crackers are primarily made from flour, which is derived from grains like wheat, rice, or corn. These grains are rich in starch, a complex carbohydrate that provides energy.

Here's a breakdown:

* Carbohydrates: The main component, providing energy.

* Proteins: Present in small amounts from the flour and any added ingredients like yeast or milk.

* Fats: Might be present in small amounts depending on the type of cracker and added ingredients like butter or oils.

So, while crackers might contain trace amounts of other biomolecules, carbohydrates are the dominant biomolecule responsible for their structure and energy content.