Question

What is an isotonic solution?

• A. A solution whose water concentration is lower than the internal concentration.
• B. A solution whose water concentration is same as compared to internal concentration.
• C. A solution whose water concentration is more than the internal concentration.
• D. None of the above.

Answer 1

Answer: (B)

A solution whose water concentration is same as compared to internal concentration.

• If both the medium and cell has exactly the same water concentration and thus, there will be no net movement of water across the cell membrane is known as an isotonic solution.
• The cells remain of the same size.
  Hence, the correct option is B.