Final answer:
Low-density lipoprotein (LDL) is commonly known as 'bad cholesterol' because it carries cholesterol that can form plaques in the arteries.
Step-by-step explanation:
Low-density lipoprotein (LDL) is commonly known as 'bad cholesterol' because it carries cholesterol that can form plaques in the arteries. These plaques can block blood flow and lead to heart disease. High-density lipoprotein (HDL), on the other hand, is known as 'good cholesterol' because it helps remove cholesterol from the arteries.
Learn more about cholesterol and its impact on cardiovascular health