[Campbell Biology P.13] Which of the following statements best describes the overarching ro... | Practice Question

Which of the following statements best describes the overarching role of ion gradients across the various biological processes illustrated in Figure 44.17?

  • A: To directly generate ATP for cellular energy.
  • B: To maintain a constant pH within the cell.
  • C: To provide potential energy that powers diverse cellular and organismal functions, including transport, signaling, and movement.
  • D: To primarily facilitate the movement of water across membranes through osmosis.

Explanation

The introductory paragraph of 'Ion Movement and Gradients' explicitly states that 'By generating ion gradients, ion transport provides the potential energy that powers processes ranging from an organism's regulation of salts and gases in internal fluids to its perception of and locomotion through its environment.' This generalizes to all the specific examples provided.