Which of the following is most likely true of a protein that cotransports glucose and sodium ions into the intestinal cells of an animal?

Question

Quizplus · Accepted Answer

Cotransporters use the energy stored in an electrochemical gradient of one molecule to transport another against its concentration gradient. In this case, the transport of sodium ions down their electrochemical gradient provides the energy needed to transport glucose against its concentration gradient into the cell. Therefore, option D is the most likely true statement. Option A is false because sodium and glucose bind to different sites on the cotransporter. Option B is false because transport of glucose against its concentration gradient does not provide energy for uptake of sodium ions. Option C is false because the cotransporter only transports glucose and sodium ions, not potassium ions.

Which of the Following Is Most Likely True of a Protein