PrepBharat

1. What will be the direction of movement of water, when solution A having water potential of –9 bars and another solution B of –4 bars is separated by a semi-permeable membrane?
a) B to A
b) A to B
c) Both directions
d) none

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2. If the external solution is more dilute than cytoplasm, then the external solution is said to be
a) Hypotonic
b) Hypertonic
c) Isotonic
d) Isothermal

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3. During plasmolysis
a) Cell membrane of a plant cell shrinks away from its cell wall
b) Water first lost from the cytoplasm and then from the vacuoles
c) Area between cell wall and shrunken protoplast is occupied by outer solution
d) All the above

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4. What happens when plant cell is put in hypotonic solution?
a) Cell swells up
b) Cell undergoes plasmolysis
c) Cell wall shrinks
d) Cell will burst

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5. The pressure exerted by the protoplast due to the entry of water against the rigid cell wall is called
a) Osmotic potential
b) Pressure potential
c) Water potential
d) Matrix potential

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6. Imbibition is
a) Special type of diffusion
b) Osmosis
c) Facilitated diffusion
d) Active transport

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7. Imbibition is characterized by
a) Increase in volume
b) Release of energy
c) Increase in pressure
d) All of these

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8. The best example of imbibition is
a) Absorption of water by seed
b) Absorption of water by dry wood
c) Both (a) and (b)
d) None of these

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9. Which of the following is correct about imbibitions?
a) It requires ψ \[\omega\] gradient between the absorbent and the liquid imbibed.
b) It requires affinity between the absorbent and the liquid.
c) Imbibition pressure is produced by the swelling of wood and in turn used by prehistoric man to split rocks and boulders.
d) All the above

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10. The path of the movement of water is demonstrated by using
a) Solution containing pure water
b) Solution of water and mineral
c) Dye (colour) dissolved in water
d) All of these

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