**Diffusion Pressure Deficit (DPD)** of a fully turgid plant cell is:
- Maximum (equal to osmotic pressure)
- Zero (cell can absorb no more water)
- Negative
- Equal to wall pressure
Show answer and solution
Correct answer: B. Zero (cell can absorb no more water)
DPD = OP − TP.
In a fully turgid cell, turgor pressure equals osmotic pressure
⇒ DPD = 0 (cell cannot absorb more water).
In a flaccid cell (TP = 0), DPD = OP.