Transport in Plants Test

Question 1
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What happens during endosmosis? Choose the correct answer from the following.

A
Water molecules diffuse from lower water potential to higher water potential.

B
Water molecules diffuse from higher water potential to lower water potential.

C
Water molecules move from a solution towards pure water.

D
Water molecules move from cell towards its exterior.

Question 2
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Study the following table showing the components of water potential of three mesophyll cells A, B and C.
Cell
Osmotic potential (Mpa)
Pressure potential (Mpa)
A
B
C
-0.6
-0.5
-0.9
0.2
0.3
0.4
If the above cells are in direct contact with each other, than the water moves at the lowest rate between the two mesophyll cells.

A
C$$\rightarrow $$B

B
B$$\rightarrow $$C

C
B$$\rightarrow $$A

D
A$$\rightarrow $$C

Question 3
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Which of the following is true for cells placed in distilled water?

A
The cells remains unchanged.

B
Water moves from inside of the cell to the outside.

C
Water moves from outsides of the cell to the inside.

D
The cells shrink.

E
The cells dissolve.

Question 4
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Which of these describes the condition that will occur, when a human blood cell is placed in a $$10$$% solution of sodium chloride?

A
Water will rush into the cell and the cell will burst.

B
Water will rush out of the cell and the cell will shrivel.

C
Water will continue to move into and out of the cell with no overall effect upon the cell.

D
Water will first rush into the cell and then be forced back out again.

E
Water will rush in, filling the vacuole and making the cell turgid.

Question 5
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Which of the following elements of the phloem is responsible for conducting sugar?

A
Companion cells

B
Parenchyma cells

C
Sieve tube

D
None of the above

Question 6
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An experiment was conducted to determine the effect of concentration on the rate of diffusion. A student filled six dialysis bags with different concentrations of salt solutions and placed each of them in a separate beaker of distilled water.
Dialysis bags model the selective permeability of cell membranes and allow small molecules, ions and water to pass through according to the surrounding concentration gradient. A conductivity probe was used to measure the change in concentration of ions in the beaker over time.

Which curve on the graph below accurately predicts the rate of diffusion as a function of salinity?

A
A

B
B

C
C

D
D

Question 7
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'A' and 'B' are two adjacent living cells. The cell 'A' has solute potential $$(\Psi _s)$$ of
-9 bars and pressure potential $$(\Psi _p)$$ of 4 bars, whereas cell 'B' has solute potential $$(\Psi _s)$$ of
-8 bars and pressure potential $$(\Psi _p)$$ of 5 bars. What will be the direction of water movement between these cells?

A
Cell A to Cell B

B
Cell B to Cell A

C
Do not move in any direction.

D
Moves in both the directions.

Question 8
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A cell membrane regulates which substances can enter and leave the cell based upon their size and polarity. Which mode of the cell transport is the movement of water down its concentration gradient?

A
Facilitated diffusion

B
Osmosis

C
Simple diffusion

D
Passive transport

E
Active transport

Question 9
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Which of the following is not correct in mass flow hypothesis?

A
The sugar is moved bidirectionally

B
Loading of the phloem sets up a water potential gradient that facilitates the mass movement in the phloem

C
As hydrostatic pressure in the phloem sieve tube increases pressure flow stops and sap is accumulated in phloem

D
The sugar which is transported is sucrose

Question 10
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Consider the following statements and select the correct one:
Statement (A): Pure water has maximum water potential.
Statement (B): The osmotic potential is zero in pure water

A
Both statements are correct and (B) is not the reason for (A)

B
Both statements are wrong

C
Both statements are correct and (B) is the reason for (A)

D
Both statements are correct

Submit Test

Cell	Osmotic potential (Mpa)	Pressure potential (Mpa)
A B C	-0.6 -0.5 -0.9	0.2 0.3 0.4

Transport in Pl...

Question 1

Water molecules diffuse from lower water potential to higher water potential.

Water molecules diffuse from higher water potential to lower water potential.

Water molecules move from a solution towards pure water.

Water molecules move from cell towards its exterior.

Question 2

C$$\rightarrow $$B

B$$\rightarrow $$C

B$$\rightarrow $$A

A$$\rightarrow $$C

Question 3

The cells remains unchanged.

Water moves from inside of the cell to the outside.

Water moves from outsides of the cell to the inside.

The cells shrink.

The cells dissolve.

Question 4

Water will rush into the cell and the cell will burst.

Water will rush out of the cell and the cell will shrivel.

Water will continue to move into and out of the cell with no overall effect upon the cell.

Water will first rush into the cell and then be forced back out again.

Water will rush in, filling the vacuole and making the cell turgid.

Question 5

Companion cells

Parenchyma cells

Sieve tube

None of the above

Question 6

A

B

C

D

Question 7

Cell A to Cell B

Cell B to Cell A

Do not move in any direction.

Moves in both the directions.

Question 8

Facilitated diffusion

Osmosis

Simple diffusion

Passive transport

Active transport

Question 9

The sugar is moved bidirectionally

Loading of the phloem sets up a water potential gradient that facilitates the mass movement in the phloem

As hydrostatic pressure in the phloem sieve tube increases pressure flow stops and sap is accumulated in phloem

The sugar which is transported is sucrose

Question 10

Both statements are correct and (B) is not the reason for (A)

Both statements are wrong

Both statements are correct and (B) is the reason for (A)

Both statements are correct

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