Question

Coupled transport to move nutrients into the cell against their concentration gradients is most likely to occur along with the electrical gradient of A. positive ions into the cell. B. positive ions out of the cell. C. negative ions inside the cell. D. water.

Answer 1

Active transport: moving against a gradient

To move substances against a concentration or electrochemical gradient, a cell must use energy. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the right concentrations of ions and molecules in living cells.