Final answer:
In a hypotonic solution, the solute concentration is higher inside the cell, resulting in water moving into the cell to balance the concentration gradient.
Step-by-step explanation:
The question pertains to the concept of osmosis and how solute concentration affects the movement of water into and out of cells. In the scenario given, we are looking for where the solute concentration is higher when the solution is described as hypotonic. The correct response is, 'The solute concentration is higher inside the cell when the external solution is hypotonic.'
This is confirmed by understanding that a hypotonic solution has a lower concentration of solutes compared to another solution, specifically the inside of a cell. In this situation, water moves into the cell because it flows from a region of lower solute concentration (outside) to a region of higher solute concentration (inside), seeking to achieve equilibrium. This influx of water can cause the cell to expand and, if unregulated, potentially burst (lyse).