Question

Choose the correct answers from the alternatives given.
In a fully turgid cell, which one of the following would be zero?

• A. Suction pressure
• B. Osmotic pressure
• C. Wall pressure
• D. Turgor pressure

Answer 1

Answer: (A)

Suction pressure

Suction pressure or the DPD is given as the difference of osmotic pressure and the turgor pressure, $DPD=OP-TP$

In a fully turgid cell, the entry of water into the cell causes the development of the turgor pressure, therefore, TP cannot be zero. When the increasing turgor pressure becomes equal to the decreasing osmotic pressure, the entry of water into the cell would stop. This means DPD becomes zero in a fully turgid condition.

Hence, the correct answer is 'Suction pressure'.