Question

Which one of the following is incorrect statement with respect to diagram?

• A. Guard cells are smaller than their surrounding cell
• B. Microfibrils are arrange laterally
• C. Guard cells are filled with water
• D. OP of guard cells are zero

Answer 1

The correct option is D OP of guard cells are zero

D. OP of guard cells are zero

Reason: The kidney-shaped cells surrounding each stoma are guard cells. The guard cell regulates the rate of transpiration by opening and closing the stomata. When the guard cells are turgid, the stomatal opening is large. This turgidity is due to the accumulation of k+ions. Potassium ions move into the vacuoles. The water moves into the vacuoles. As a result, the guard cells expand and stoma opens. So it is not possible that OP of guard cell to be zero.