What are the two types of cholesterol and what do they do?

low-density lipoprotein (LDL) and high-density lipoprotein (HDL) are the two types of cholesterol.

Explanation:

Cholesterol is a fat-like substance found in our blood which is essential to keep our cells and organs healthy.  The low-density lipoprotein (LDP) also known as bad cholesterol. Too much LDL  in our blood can cause the risk of heart disease and stroke. It is the main source of blockage in the arteries. The high-density lipoprotein (HDP) also known as good cholesterol. It works to absorb cholesterol carries it back to the liver. A high level of HDL can lower the risk of heart disease.

Single strand binding protein by peptide bond