Page 255 - BIOCHEMISTRY II

 In contrast to carbohydrates and lipids whose major function
is to provide energy

 Amino acids primary role is to serve as building blocks for
body protein synthesis

 All of the macronutrients (protein, carbohydrate, and fat)
are made up of C, H and O molecules
Protein alone also contains an additional N molecule.

 When the body digests protein, these nitrogen molecules
are generally released into the blood and then excreted
(100 g protein contain16 g nitrogen)