The graph shows the relationship between ψ_w (water potential), ψ_s (solute potential) and ψ_p (pressure potential)for a plant cell placed in pure water

What are the correct labels for the graph?

P Q R

ψ_w ψ_p ψ_s
P Q R

ψ_w ψ_s ψ_p
P Q R

ψ_p ψ ψ_s
P Q R

ψ_p ψ_w ψ_s

P	Q	R
ψ_w	ψ_p	ψ_s

P	Q	R
ψ_w	ψ_s	ψ_p

P	Q	R
ψ_p	ψ	ψ_s

P	Q	R
ψ_p	ψ_w	ψ_s

Which of the following shows the correct explanation of the given figures?

Cell “A” will lose H₂O, Cell “B” will gain H₂O, Cell“C” neither gain nor loses H₂O.
Cell “A” neither gain nor loses H₂O, Cell “B” will gain H₂O, Cell “C” will lose H₂O
Cell “A” will gain, Cell “B” neither gain nor loses H₂O,Cell “C” lose H₂O
Cell “A” will gain H₂O, Cell “B” will lose H₂O, Cell“C” neither gain nor loses H₂O.

At the endodermis, water movement through the apoplast pathway is obstructed by which alphabet?

Refer the experiment given below

After a few days, which of the following will have occurred?

A rise in level X and a drop in level Y.
A drop in level X and a drop in level Y.
A rise in level X and a rise in level Y.
A drop in level X and a rise in level Y.

Given below is the diagram of stomatal apparatus. In which of the following all of the three parts labelled as A, B and Care correctly identified?

A -Microfibril, B - Stomatal aperture, C - Guard cell
A -Microfibril, B -Guard cell, C - Stomatal aperture
A -Stomatal aperture, B -Guard cell, C - Microfibril
A -Guard cell, B - Stomatal aperture, C- Microfibril

Study the experiment shown below.

After a few days, which of the following will have occurred?

A rise in level X and Y
A drop in level X and level Y.
A rise in level X and a drop in level Y
A drop in level X and a rise in level Y.

Which of the following criteria does not pertain to facilitated transport?

High selectivity
Transport saturation
Uphill transport
Requirement of special membrane proteins

Solution

Substance that have a hydrophilic moiety, find it difficult to pass through the membrane, their movement has to be facilitated by the membrane protein without expenditure of ATP energy.Facilitated diffusion cannot cause net transport of molecules from a low to a high concentration or uphill transport. Transport rate reaches a maximum when all of the protein transporters are being used (saturation). Facilitated diffusion is very specific.

Which of the following is a difference between transport by xylem and transport by phloem?

Active transport moves xylem but not phloem sap
Transpiration moves phloem sap but not xylem sap.
Xylem sap moves up; phloem sap moves up and down.
Xylem moves from sugar source to sink but phloem does not.

In soil, the water available for root absorption is

gravitational water
capillary water
hygroscopic water
combined water

Active transport of solute in plants refers to flow of solutes against a concentration gradient and therefore requires input of energy. This energy is derived.

Always from hydrolysis of ATP
Not only from ATP hydrolysis but also from the collapse of a proton motive force
Partly form the input from ATP hydrolysis and partly from the collapse of a proton motive force
From the different sources depending on the solutes

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