Final answer:
HDL (High-density lipoprotein) is the lipoprotein that picks up cholesterol from dying cells and transfers it to other lipoproteins and the liver.
Step-by-step explanation:
The lipoprotein that picks up cholesterol from dying cells and other sources and transfers it to other lipoproteins, as well as directly to the liver, is HDL (High-density lipoprotein).
HDL is responsible for carrying cholesterol out of the bloodstream and into the liver, where it is either reused or removed from the body with bile.