Protein pumps are proteins found in the cell membrane of most cells. These move hydrogen ions from low concentration inside the cell to higher concentration outside the cell.

Question

Which of the following is necessary for this type of transport to occur?

Question 2 options:

energy as ATP

energy as fatty acid tails

energy as glucose

energy as starch

Answer 1

The transport described in your question—moving hydrogen ions from an area of low concentration to one of high concentration—is an example of active transport. Active transport requires energy to move substances against their concentration gradient.

Among the options provided, the correct answer is:

energy as ATP

ATP (adenosine triphosphate) is the primary energy currency in cells and is necessary for active transport processes, including the function of protein pumps.