MCQ Questions for Class 11 Biology: Ch 11 Transport in Plants

MCQ Questions for Class 11 Biology: Ch 11 Transport in Plants

1. Potometer works on the principle of
(a) Root pressure
(b) Amount of water absorbed equals to the amount transpired
(c) Osmotic pressure
(d) Potential difference between the tip of the tube and that of the plant
► (b) Amount of water absorbed equals to the amount transpired

2. The rate of transpiration of a plant would gradually increase if
(a) Relative humidity decreases
(b) Relative humidity remains unchanged
(c) Relative humidity increases
(d) Water potential gradient remains unchanged
► (a) Relative humidity decreases

3. The molecules which move from higher to lower regions are called as
(a) Imbibition
(b) Diffusion
(c) Osmosis
(d) Guttation
► (b) Diffusion

4. Cohesion-tension theory is related to
(a) Transpiration
(b) Respiration
(c) Ascent of sap
(d) Photosynthesis
► (c) Ascent of sap

5. A concept fundamental to understanding water movement is called
(a) Pressure potential
(b) Water potential
(c) Solute potential
(d) Concentration gradient
► (b) Water potential

6. In wall of guard cell, cellulose microfibrils are arranged
(a) Transversely
(b) Tangently
(c) Radially
(d) Obliquely
► (c) Radially

7. Rupture and fractionalization of water column present in treachery elements does not occur during ascent of sap due to
(a) Cohesion and adhesion
(b) Lignified thick walls
(c) Weak gravitational pull
(d) Transpirational pull
► (a) Cohesion and adhesion

8. Which one of the following will not directly affect transpiration?
(a) Temperature
(b) Chlorophyll content of leaves
(c) Wind speed
(d) Light
► (b) Chlorophyll content of leaves

9. The system of adjacent cell walls that is continuous throughout the plant is called as
(a) Symplast
(b) Apoplast
(c) Guttation
(d) Root pressure
► (b) Apoplast

10. Transport over longer distances proceeds through the vascular system
(a) Osmosis
(b) Translocation
(c) Transpiration
(d) Diffusion
► (b) Translocation

11. Rate of transpiration is highest when
(a) Soil is dry and air is humid
(b) Soil is wet and air is dry
(c) Both soil and air are dry
(d) Soil is wet and air is humid
► (b) Soil is wet and air is dry

12. Stomata close down if relative humidity of atmosphere falls below
(a) 50%
(b) 70%
(c) 80%
(d) 60%
► (a) 50%

13. ψp denotes to
(a) Water potential
(b) Negative potential
(c) Pressure potential
(d) Solute potential
► (c) Pressure potential

14. Select the correct equation from the following
(a) DPD = WP – OP
(b) DPD = WP + OP
(c) DPD = OP + WP
(d) DPD = OP – WP
► (d) DPD = OP – WP

15. Munch hypothesis is based on
(a) Translocation of food due to turgor pressure gradient and imbibition force
(b) Translocation of food due to turgor pressure gradient
(c) Translocation of food due to imbibition force
(d) None of the above
► (b) Translocation of food due to turgor pressure gradient

16. The pathway of the movement of water through the cell wall only is called
(a) Symplast pathway
(b) Vacuolar pathway
(c) Plasmodesmata pathway
(d) Apoplast pathway
► (d) Apoplast pathway

17. Which of the following has highest water potential?
(a) 1 M sugar solution
(b) Distilled water
(c) 1 M salt solution
(d) 1 M sugar solution with 2-3 bar pressure
► (b) Distilled water

18. Water molecules are attracted to each other in the liquid phase more than to water in the gas phase
(a) Adhesion
(b) Surface tension
(c) cohesion
(d) capillarity
► (b) Surface tension

19. A and B are contiguous cells. A has OP = 10 atm and TP = 7atm, B has OP = 8atm, TP = 3 atm, DPD = 5 atm. The result would be
(a) No movement of water
(b) Equilibrium between the two
(c) Movement of water from B to A
(d) Movement of water from A to B
► (d) Movement of water from A to B

20. Transport of water and mineral in plants take place through
(a) Collenchymas tissues
(b) Phloem tissues
(c) Parenchyma
(d) Xylem tissues
► (d) Xylem tissues

21. Munch hypothesis is based on
(a) Translocation of food due to turgor pressure gradient and imbibition force
(b) Translocation of organic solutes
(c) Translocation of food due to turgor pressure gradient
(d) Translocation of food due to imbibition force
► (c) Translocation of food due to turgor pressure gradient

22. In plants, capillarity is aided by the small diameter of
(a) Trachery elements
(b) Cortical cells
(c) Parenchyma cells
(d) Phloem tissue
► (a) Trachery elements

23. What is the effect of turgor pressure in Munch hypothesis?
(a) Increase of turgor pressure
(b) Decrease of turgor pressure
(c) No change in turgor pressure
(d) Independent to water potential gradient
► (a) Increase of turgor pressure

24. Radial conduction of water takes place by
(a) phloem
(b) vessels
(c) vessels and tracheids
(d) ray parenchyma cells
► (d) ray parenchyma cells

25. Diffusion rate is affected by
(a) Pressure and soil
(b) Water and pressure
(c) Gradient concentration and pressure
(d) Soil and water
► (c) Gradient concentration and pressure

26. The excess water collected in the form of droplets around special openings of veins near tip of leaves is called as
(a) Guttation
(b) Transpiration
(c) Bleeding
(d) Oozation
► (a) Guttation

27. Proteins that form huge pores in the membrane of the certain organelles and bacteria are called as
(a) Porins
(b) Pressure gradient
(c) Enzymes
(d) Flaccid
► (a) Porins

28. The form of sugar transported through the phloem is
(a) Sucrose
(b) Fructose
(c) Ribose
(d) Glucose
► (a) Sucrose

29. The ingredient not used for preserving food stuff is
(a) Vinegar
(b) Salt and sugar
(c) Sugar and vinegar
(d) Ethanol
► (d) Ethanol

30. The component that is essential to perform all physiological activities of the plant is
(a) Pressure
(b) Water
(c) Temperature
(d) All of the above
► (b) Water

31. Root hairs absorb water from soil with the help of
(a) Root pressure
(b) Osmotic pressure 
(c) Suction pressure
(d) Turger pressure
► (b) Osmotic pressure 

32. In plant cell, the cytoplasm of the adjacent cells are connected through bridges called
(a) Intercellular bridge
(b) Plasmodesmata
(c) Intracellular bridge
(d) Cell membrane
► (b) Plasmodesmata
Previous Post Next Post
X
Free Study Rankers App Download Now