Final answer:
Receptor-mediated transport of macromolecules across a cell is called transcytosis, which involves specific interactions between molecules and cell surface receptors. The correct option is c.
Step-by-step explanation:
The process is a combination of endocytosis and exocytosis, where cells internalize macromolecules from the extracellular environment using a specific mechanism.
In receptor-mediated endocytosis, the target molecule binds to receptor proteins on the cell surface, leading to the formation of clathrin-coated vesicles that facilitate the internalization of the molecule.
Afterward, these vesicles may pass through the cell and undergo exocytosis, releasing their content on the opposite side. Transcytosis is different from phagocytosis (cell eating) and pinocytosis (cell drinking), which are non-specific forms of endocytosis, and differs from signal transduction and opsonization, which are related but separate cellular processes.
Hence, Option c is correct.