Question

Which of the statements are correct about Isotonic solution?

• A. External medium of the cell contains lower concentration of water.
• B. External medium of the cell contains higher concentration of water.
• C. External medium of the cell contains same concentration of water as that of the cell.
• D. Concentration gradient of water helps to move the molecules.

Answer 1

The correct option is C External medium of the cell contains same concentration of water as that of the cell.

External medium surrounding the cell has the same concentration of water as that of the cell(also same solute concentration). There is no sign of water gain or loss from the cell. The amount of water transported into the cell equals the amount of water transported out from the cell. The solute concentration inside the cell is equal to the solution outside the cell.