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.