X. Cholesterol is a waxy fat-like substance.
A. It is used by the body to build cell walls and essential harmones.
B. Cholesterol is carried through the blood by particles called lipoproteins.
C. The body absorbs it from the animal fats one eats.
D. It is produced by liver.
Y. Lipoproteins are of two types Low density and High density Lipoproteins.