Final answer:
Protein pumps, like the sodium-potassium pump, facilitate cation transport and result in the repulsion of cations. Therefore, the correct option is a) Yes, because it facilitates cation transport.
Step-by-step explanation:
The answer to whether a protein pump results in the repulsion of cations is a) Yes, because it facilitates cation transport. Protein pumps, like the sodium-potassium pump, actively transport ions across cell membranes. They utilize energy from ATP to move ions against their concentration gradient. In the case of the sodium-potassium pump, it transports three sodium ions out of the cell for every two potassium ions it brings in. This process results in a higher concentration of cations (positively charged ions) outside the cell, leading to their repulsion.