Transport of plants

 Transport of plants 

Q31. The greater the concentration of water in a system, the greater is its 

(1) Kinetic energy 

(2) Water potential 

(3) Solute potential 

(4) Both (1) and (2)

Ans.4

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Q32. If the external solution balances the osmotic pressure of the cytoplasm it is said to be 

(1) Plasmolysed 

(2) Hypertonic 

(3) Hypotonic 

(4) Isotonic

Ans.4

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Q33. Select the mismatched pair. 

(1) Guttation - Root pressure 

(2) Transpiration - Evaporative loss of water

(3) Imbibition - Irreversible 

(4) Plasmolysis - Due to exosmosis

Ans.3

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Q34. Which of the following external factors affect the rate of transpiration? 

a. Light 

b. Vapour pressure gradient 

c. Temperature 

d. Number of stomata 

e. Root shoot ratio 

f. Abscisic acid 

(1) a, b, d and e 

(2) a, b and c 

(3) d, e and f 

(4) a, c, d and f 

Ans.2

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Q35. Select the mismatch. 

(1) Phloem sap - Mainly sucrose 

                               and  water 

(2) Monocot guard cells - Dump-bell

                                               shaped 

(3)Cuticular                   - Maximum in

     Transpiration              Woody stem

(4) Ascent of xylem sap - Capillarity

Ans.3

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Q36. If pressure greater than atmospheric pressure is applied to a solution, its water potential 

(1) Decreases 

(2) Increases 

(3) Is not affected 

(4) Becomes more negative

Ans.2

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Q37. A special type of diffusion when water is absorbed by solids, colloids causing them to enormously increase in volume is called 

(1) Imbibition 

(2) Plasmolysis 

(3) Osmosis 

(4) Guttation

Ans.1

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Q38. Select the Incorrect statement. 

(1) Transport over long distances takes place through xylem and phloem 

(2) In rooted plants transport in xylem is essentially bidirectional 

(3) Diffusion is the only means for gaseous movement within plant body 

(4) Short distance transport occurs by diffusion and cytoplasmic streaming

Ans.2 

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Q39. The symplastic system is 

(1) The system of adjacent cell wall 

(2) Not the system of inter-connected protoplasts 

(3) The movement aided by cytoplasmic streaming 

(4) Not connected through plasmodesmata

Ans.3

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Q40. Two molecules cross through carrier proteins of membrane in the same direction is 

(1) Uniport         (2) Symport 

(3) Antiport        (4) Aquaporins

Ans.2

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Q41. Which of the following plant factors affect the rate of transpiration? 

(1) Canopy structure and waxy coating 

(2) Plant water and soil water 

(3) Humidity and ABA 

(4) Vapour pressure gradient and root-shoot ratio

Ans.1

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Q42. Select the incorrect statement. 

(1) More the solute molecules, the lower is the solute potential 

(2) All solutions have a lower water potential than pure water 

(3) In a turgid cell DPD = OP 

(4) A cell swells in hypotonic solutions

Ans.3

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Q43. In stomata, the cellulosic microfibrils of the cell wall of guard cell are oriented 

(1) Radially as well as longitudinally 

(2) Radially 

(3) In all possible directions 

(4) Longitudinally

Ans.2

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Q44. Which value will go on increasing if a flaccid cell is placed in hypotonic solution? 

(1) Osmotic pressure 

(2) Solute potential 

(3) DPD 

(4) Both (2) and (3)

Ans.2

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Q45. The apoplast system is continuous throughout the plant except which one of the following tissues in the roots? 

(1) Root hair 

(2) Endodermis 

(3) Epidermis 

(4) Cortex

Ans.2