1. Proteins. CHON (Carbon, Hydrogen, oxygen, and nitrogen). Proteins must be obtain by food source that contains protein. Important to mammals because ex. Humans need protein to build muscles.
2 Carbohydrates. CHO. Carbohydrates contains lactose, glucose. Carbohydrates provides energy but does not serve as long term.
3. Lipids (CHO). Is hydrophobic. Stores energy into long term.