Final answer:
Proteins are the organic compounds that facilitate transportation across cell membranes, serving as receptors, transport channels, and active pump enzymes.
Step-by-step explanation:
The organic compounds that facilitate transportation across cell membranes by acting as receptors, transport channels for electrolytes, and enzymes to drive active pumps are proteins. These proteins can be involved in several types of transport mechanisms, such as facilitated diffusion, active transport, and secondary active transport. For instance, carrier proteins, which function as pumps, use ATP to move molecules against their concentration gradients, while channel proteins provide hydrophilic pathways for polar molecules to cross the membrane.