which of the following statements best describes the function of the nuclear pore complex found in eukaryotic cells?

The nuclear pore complex (NPC) found in eukaryotic cells functions as a highly regulated gateway that controls and mediates the transport of molecules between the nucleus and the cytoplasm. It allows the selective passage of macromolecules such as RNA and proteins in both directions, while also permitting small molecules and ions to diffuse freely through. This ensures controlled communication and exchange necessary for cellular function and homeostasis. The NPC is composed of multiple proteins called nucleoporins and actively regulates this transport process without direct energy expenditure but through mechanisms involving concentration gradients and transport receptors.