Question

The actual pressure with which water enters into the cell is called______.

• A. DPD
• B. OP
• C. WP
• D. Diffusion

Answer 1

The correct option is A DPD

The movement of water into the cell depends on the Diffusion Pressure Deficit (DPD) or the suction pressure of the cell. A cell that is having more solutes than solvent will have less diffusion pressure and more suction pressure. So, water will move from the adjacent cell having less DPD.

A. DPD indicates the deficiency of diffusion capacity due to less amount of solvent and more amount of solute. So, the cell with more solute will have more DPD and will attract water from the place of less DPD. It has a positive value. In a cell, water is present along with dissolved solutes (sap), so DPD is used to determine the movement of water.

B. Osmotic Pressure (O.P) is the pressure that is applied to prevent the flow of pure water into the solution. More the quantity of solute in the solution more will be the osmotic pressure applied.

C. Water Potential (W.P) is the pressure generated due to the presence of water molecules. It is similar to DPD but it is a negative value.

D. Diffusion is the passive process of movement of molecules of any substance from the place of their higher concentration to the place of their lower concentration.

Hence, the correct answer is 'DPD'.