Final answer:
The LDL (low-density lipoprotein) transports the majority of cholesterol to cells for steroid hormone synthesis or cell membrane incorporation, thus being called 'bad cholesterol.'
Step-by-step explanation:
The type of lipoprotein that transports the majority of cholesterol to cells for steroid hormone synthesis or cell membrane incorporation is the LDL (low-density lipoprotein). LDL is primarily responsible for carrying cholesterol from the liver to the cells throughout the body. While they do transport cholesterol that is essential for various cellular functions like steroid hormone production, an excess of LDL can lead to the formation of arterial plaques, which is a risk factor for atherosclerosis and heart disease. Therefore, LDL is often referred to as 'bad cholesterol' because it can deposit cholesterol in artery walls.