Question

In a fully turgid cell ............

• A. Ψ_s will be negative and Ψ_p will be positive
• B. Ψ_p will be negative and Ψ_s will be positive
• C. Both Ψ_p and Ψ_s will be positi
• D. Both Ψ_s and Ψ_p are negative

Answer 1

Answer: (A)

Relationship between ${\Psi }_w,{\Psi }_s$ and ${\Psi }_p$ in a 28 typical vacuolated cell is as follows :
${\Psi }_w={\Psi }_s+{\Psi }_p$
At zero turgor, ${\Psi }_p=0$, then ${\Psi }_s={\Psi }_w$·
In fully turgid cell, ${\Psi }_p$ and ${\Psi }_s$ are equal, but
with opposite signs, hence ${\Psi }_w$ = 0.
Mature cells show intermediate state between zero turgor and full turgor.