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Question

(C) Water potential $(\Psi_w)$ in a cell is the sum of solute potential $(\Psi_s)$ and pressure potential $(\Psi_p)$: $\Psi_w = \Psi_s + \Psi_p$.

Vedclass · Accepted Answer

$I, IV$

Vedclass · Answer

(C) Water potential $(\Psi_w)$ in a cell is the sum of solute potential $(\Psi_s)$ and pressure potential $(\Psi_p)$: $\Psi_w = \Psi_s + \Psi_p$.						Cell			Water Potential $(\Psi_w)$ (MPa)							$A$			$-0.21 + 0.05 = -0.16$							$B$			$-0.22 + 0.02 = -0.20$							$C$			$-0.23 + 0.05 = -0.18$			Water moves from a region of higher water potential to a region of lower water potential.Comparing the values: $\Psi_w(A) = -0.16$,$\Psi_w(B) = -0.20$,$\Psi_w(C) = -0.18$.Since $-0.16 > -0.18 > -0.20$,the water potential order is $A > C > B$.Therefore,water will move from $A \rightarrow C$,$A \rightarrow B$,and $C \rightarrow B$.Looking at the options provided:$I. A \rightarrow B$ (Correct)$II. B \rightarrow C$ (Incorrect,water moves $C \rightarrow B$)$III. C \rightarrow A$ (Incorrect,water moves $A \rightarrow C$)$IV. C \rightarrow B$ (Correct)Thus,$I$ and $IV$ are correct.

Cell	Osmotic Potential (MPa)	Pressure Potential (MPa)
$A$	$-0.21$	$0.05$
$B$	$-0.22$	$0.02$
$C$	$-0.23$	$0.05$

Similar Questions

What are the Greek symbol for water potential and the unit of pressure,respectively?

$A-$ Positive value of turgor pressure is called ${\Psi _P}$.
$R-$ The more the solute molecules,the lower (more negative) is the ${\Psi _S}$.

Define water potential and solute potential.

The movement of water molecules from a root cell to the adjacent cortical cell occurs based on what?

Choose the correct option:
$(1)$ The value of ${\psi _S}$ is always negative / positive.
$(2)$ Porins are a type of carbohydrates / proteins.

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