Carbohydrates, lipids, proteins, and nucleic acids are the four biomolecules critical for the structure and function of living things. Examine some of the common functions of the biomolecules. Which of these is a function of carbohydrates? Choose ALL that apply.

Providing energy and regulation of blood glucose.

Sparing the use of proteins for energy.

Breakdown of fatty acids and preventing ketosis.

Explanation:

The main function of carbohydrates is to provide energy and regulation of glucose in the blood.  It prevent the use of proteins for production of energy and also promote breakdown of fatty acids and preventing ketosis. Ketosis is a process that occurs when our body doesn't have carbohydrates in sufficient quantity for the production of energy. Carbohydrates are the first biomolecules that are used for energy production.