The breakdown of fats within the body is useful for .
a. protein synthesis
b. building amino acid chains
c. carbohydrate breakdown
d. building cell membranes
e. building nucleotides

D

Explanation:

Fats breakdown in the body and play a very important role. Specifically in the formation of the cell membrane. Cell member is made up of lipid bilayer in which protein molecules are embedded. So, option D is correct.

i believe the correct answer is d