Iron Ions and Cholesterol are Brought into the Cell by the Process

Question

Iron ions and cholesterol are brought into the cell by the process of ________.
A) pinocytosis
B) phagocytosis
C) receptor-mediated pinocytosis
D) active transport
E) None of the answers are correct.

Accepted Answer

Iron ions and cholesterol are brought into the cell through receptor-mediated pinocytosis, which involves the binding of specific receptors on the cell membrane to the substances being transported. Pinocytosis and phagocytosis are both types of bulk transport, but they involve the uptake of larger particles such as whole cells or large molecules. Active transport involves the movement of molecules against their concentration gradient, typically requiring energy in the form of ATP.