PrepBharat

1. A cell increases in volume if the external medium is
a) Hypotonic
b) Hypertonic
c) Isotonic
d) None of these

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2. All the following involves osmosis except
a) Water from soil entering a root hair
b) Water passing from root hair to adjacent cells
c) Water passing up a xylem vessel element to xylem vessel element above it
d) Water entering a mesophyll cell from xylem vessel element

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3. A cell is plasmolysed after being kept in a hypertonic solution. What will be present between the cell wall and plasmalemma?
a) Isotonic solution
b) Hypertonic solution
c) Air
d) Hypotonic solution

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4. Wilting of a plant results from excessive
a) Respiration
b) Photosynthesis
c) Absorption
d) Transpiration

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5. In seed germination, the first phenomenon which takes place is called
a) Diffusion
b) Osmosis
c) Imbibitions
d) All of these

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6. Deplasmolysis occurs in a cell when it is placed in
a) Hypotonic solution
b) Hypertonic solution
c) Isotonic solution
d) Buffer solution

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7. Grapes immersed in water would shrink if
a) Water contains salts
b) Water contains starch
c) Water is cold
d) Water is hot

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8. Plant cells submerged in distilled water will become
a) Turgid
b) Flaccid
c) Plasmolysed
d) Impermeable

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9. The plants face water stress due to the use of excessive fertilizers because of
a) Exosmosis
b) Endosmosis
c) Imbibitions
d) None of these

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10. You are given three cells such as a root hair, a cell of the inner cortical layer and a cell of the mesophyll. Arrange them in the ascending order of DPD.
a) Root hair < Cortical cell < Mesophyll
b) Cortical cell < Mesophyll < Root hair
c) Mesophyll < Root hair < Cortical cell
d) Root hair < Mesophyll < Cortical cell

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