Question

When iron is imported into the cell, many molecules of iron bind to receptors on the surface of the cell membranes at once. Iron molecules are then internalized in a clathrin-coated vesicle. However, in the absence of iron, the iron receptor exists as two non-functional enzyme subunits. Role of clathrin: _________. This type of transport is known as: _______.

Answer 1

Receptor-mediated endocytosis is a selective process in which specific molecules are transported into the cell through the use of receptors on the cell membrane. Clathrin plays a crucial role in this process by forming clathrin-coated vesicles. This type of transport is known as receptor-mediated endocytosis, and it allows cells to regulate the endocytosis of specific substances.

Step-by-step explanation:

Receptor-mediated endocytosis is a variation of endocytosis that involves the use of specific binding proteins, or receptors, on the cell membrane to selectively transport molecules or particles into the cell. Clathrin is a protein that plays a vital role in this process. It attaches to the cytoplasmic side of the plasma membrane and forms clathrin-coated pits that then become clathrin-coated vesicles. These vesicles internalize the bound molecules, such as iron, into the cell.

This type of transport is known as receptor-mediated endocytosis. It is a highly selective process that allows cells to regulate the endocytosis of specific substances. In the case of iron import into the cell, iron molecules bind to specific transferrin receptors on the cell surface. The cell then internalizes these receptor-ligand complexes through clathrin-coated vesicles.