Evaluate the significance of receptor-mediated endocytosis in the selective uptake of molecules by cells.

• A. Receptor-mediated endocytosis is significant because it allows cells to selectively uptake specific molecules by binding them to receptor proteins.
• B. Receptor-mediated endocytosis is a form of exocytosis that releases molecules from the cell.
• C. Receptor-mediated endocytosis is insignificant because it allows non-selective uptake of molecules.
• D. Receptor-mediated endocytosis uses ATP to transport molecules against their concentration gradient.

Answer: (A)