Question

Cholesterol enters the cell via RDR receptors on the outside of the cell.

A. True
B. False

Answer 1

Cholesterol does not enter cells via RDR receptors; this statement is false. It enters through receptor-mediated endocytosis using LDL receptors.

Step-by-step explanation:

In fact, cholesterol, particularly the type known as low-density lipoprotein (LDL) or "bad" cholesterol, enters cells through a process known as receptor-mediated endocytosis. The receptors involved in this process are known as LDL receptors, not RDR receptors.

Once LDL binds to these receptors on the cell surface, it is internalized into the cell, allowing the removal of LDL from the bloodstream. In conditions like familial hypercholesterolemia, these receptors are either defective or missing, resulting in high levels of cholesterol in the blood.

The statement that cholesterol enters the cell via RDR receptors is false.