Transport in plant NEET MCQ

 TRANSPORT IN PLANTS 

Q1. Water potential of pure water at standard temperature which is not under any pressure is taken as 

(1) Zero 

(3) More than zero 

(2) Less than zero 

(4) Infinite

Ans.1

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Q2. Phenomenon of absorption of water by seeds & dry wood, is called  

(1) Guttation 

(2) Imbibition

(3) Osmosis 

(4) Active absorption

Ans.2

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Q3. The solute potential of a solution is always 

(1) Zero 

(2) Negative 

(3) Positive 

(4) Greater than pure water

Ans.2

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Q4. Select the immobile element in plant 

(1) ca                (2) K 

(3) N                 (4) P

Ans.1

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Q5.The movement of molecules along the concentration gradient is in 

a. Simple diffusion 

b. Facilitated diffusion 

c. Active transport 

(1) All a, b and c 

(2) Only b and c 

(3) Only a and c 

(4) Only a and b

Ans.4

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Q6.Turgor pressure is defined as the  

(1) Pressure of cytoplasm on cell wall 

(2) Pressure of cell membrane on cell wall

(3) Pressure of cell wall on cytoplasm 

(4) Pressure of cell wall on cell membrane

Ans.1

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Q7. Which of the following is not a function associated with transpiration?

(1) Active absorption of mineral ions 

(2) Water supply for photosynthesis 

(3) Transportation of minerals to all parts of plant 

(4) Maintaining the shape & structure of the plants by keeping cell turgid

Ans.1

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Q8. Which of the following step(s) of mass flow of sugar do/does not require ATP?  

a. Movement of sucrose into companion cells and then to the sieve tube 

b. Removal of sucrose at sink 

c. Mass flow of sucrose in phloem 

(1) Only a 

(2) Only a and b 

(3) Only b and c 

(4) Only a 

Ans.4

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Q9. The opening of stoma is aided due to the orientation of the microfibrils in the cell walls of the guard cells These microfibrils are 

(1) Proteinaceous 

(2) Cellulosioc 

(3) Lipid derivative 

(4) Polynucleotide chains

Ans.2

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Q10. Select the incorrect statement 

(1) In monocots, guard cells are dumb-bell shaped 

(2) The positive pressure that develops in xylem is called root pressure 

(3) Active transport is a downhill process 

(4) Diffusion is a slow process

Ans.3

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Q11. At the sink, sucrose is moved out of the phloem sap by A as a result the osmotic pressure B in sieve tube elements.

 Fill the blanks with suitable A and B 

                A                              B 

(1) Active transport       Increases 

(2) Active transport       Decreases 

(3) Passive transport    Increases 

(4) Passive transport    Decreases

Ans.2

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Q12. In roots, which tissue layer acts as control point for solutes and allow the passage of ions in one direction only? 

(1) Epiblema 

(2) Endodermis 

(3) Pericycle lified 

(4) Cortex

Ans.2

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Q13. Select the incorrect statement w.r.t. girdling experiment.

(1) It is an experimental demonstration of translocation of food by phloem in one direction 

(2) Swelling of bark above the girdled part is due to accumulation of nutrients 

(3) In this experiment, upward movement of water is not affected initially 

(4) In a girdled plant, shoot dies first than the root

Ans.4

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Q14. The orientation of cellulose microfibrils in the cell wall of guard cells is

(1) Longitudinal  

(2) Radial 

(3) Oblique 

(4) Tangential

Ans.2

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Q15. When root pressure is high, some herbaceous plants lose small quantity of excess water in the form of drops from the margins or tips of leaves. This phenomenon is called 

(1) Imbibition  

(2) Guttation 

(3) Osmosis 

(4) Diffusion

Ans.2