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- 1. Multiple Choice
If a cell A with DPD = 5 bars is connected to cells B, C and D, whose OP and TP are respectively 5 and 5, 10 and 4, and 8 and 3, the flow of water will be
C to A, B and D
A and D to B and C
A to B, C and D
B to A, C and D
- 2. Multiple Choice
Read the following statements and select the correct option.
Statement 1: Plasmolysis is bursting of cell membrane when a cell is kept in a hypertonic Solution
Statement 2: hypertonic solution causes endosmosis.
Both statements 1 and 2 are correct.
Statement 1 is correct but statement 2 is incorrect.
Statement 1 is incorrect but statement 2 is correct.
Both statements 1 and 2 are incorrect
- 3. Multiple Choice
Which of the following transport mechanisms shows saturation of transport but does not show uphill transport?
Simple diffusion
Active transport
Facilitated diffusion
Both simple and facilitated diffusion
- 4. Multiple Choice
Depict the flow of water molecules by referring to the image given below.
From A to B
From B to A
No net movement of water
Data inadequate
- 5. Multiple Choice
Which of the following statement is correct regarding root pressure?
Majority of water transport to fulfil needs of a plant is accomplished by root pressure.
Effect of root pressure is observed at night and early morning when evaporation is low.
It maintains the shape and structure of the plants by keeping cells turgid.
It is responsible for cooling of leaf surfaces upto 10 to 15 degrees.
- 6. Multiple Choice
Highest water potential is observed in case of
Solution in a beaker
Cell sap
Pure water solvent
All of the above
- 7. Multiple Choice
During the translocation of food in plants, the sink
Has low osmotic pressure as compared to phloem sap
Has more osmotic pressure as compared to phloem sap
Receives sucrose molecules from phloem sap by facilitated diffusion
Is the part that synthesises the food
- 8. Multiple Choice
The direction of water along with dissolved minerals in xylem is
Bidirectional
Multidirectional
From shoot to roots
From roots to shoot
- 9. Multiple Choice
The loss of water in liquid phase from the plant leaves is known as
Transpiration
Guttation
Evaporation
Diffusion
- 10. Multiple Choice
The Na+/K+ pump of nerve cells
Is an energy-dependent membrane transporter
Is involved in passive transport of ions
Transports ions along their concentration gradient
Never shows saturation of transport
- 11. Multiple Choice
The cell A has an osmotic potential of -20 bars and a pressure potential of +6 bars. What will be its water potential?
-14 bars
+14 bars
-20 bars
-26 bars
- 12. Multiple Choice
Which of the following occupies the space between the cell wall and the shrunken protoplast in a plasmolysed cell?
Isotonic solution
hypotonic solution
Hypertonic solution
Water
- 13. Multiple Choice
Match column I with column II and select the correct option from the given codes.
A-(ii), B-(iii), C-(i)
A-(iii), B-(ii), C-(i)
A-(i), B-(ii), C-(iii)
A-(ii), B-(i), C-(iii)
- 14. Multiple Choice
Assertion : More is the number of solute molecules, the lower (more negative) is Ψw.
Reason : Presence of solute particles reduces the free energy of water and this decreases the water potential.
Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
Assertion is true but Reason is false.
Both Assertion and Reason are false
- 15. Multiple Choice
Assertion : Osmosis is a special type of diffusion of water through a semi-permeable membrane.
Reason : The net direction and rate of osmosis depends only on the pressure gradient.
Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
Assertion is true but Reason is false.
Both Assertion and Reason are false
- 16. Multiple Choice
Assertion : The loss of water in its liquid phase from the leaves is called guttation.
Reason :Guttation takes place at night only.
Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
Assertion is true but Reason is false.
Both Assertion and Reason are false
- 17. Multiple Choice
A plant cell attains turgidity due to
Electrolysis
Exosmosis
Plasmolysis
Endosmosis
- 18. Multiple Choice
If cell A with OP = 5 and TP = 4 is surrounded by cells with OP = 3 and TP = 1, what will be the direction of water?
From cell A to other cells
From other cells to cell A
Water will not move
Water will move up
- 19. Multiple Choice
Girdling experiment proves that
Phloem is the tissue responsible for the translocation of food
Transport via phloem essentially takes place in one direction
The direction of food transport is downwards
All the above
- 20. Multiple Choice
Assertion : Osmotic pressure is numerically equivalent to the osmotic potential.
Reason :Osmotic pressure is the negative pressure applied, while osmotic potential is positive.
Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
Assertion is true but Reason is false.
Both Assertion and Reason are false
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