plant physiology mock test

PLANT PHYSIOLOGY : TRANSPORT IN PLANTS 1

🟥 PLANT PHYSIOLOGY : TRANSPORT IN PLANTS

🟥 QUESTIONS : 25

🟥 TIME : 15 MINS

1 / 25

1) Transport of organic and inorganic materials is ?

A) Unidirectional

B) Bidirectional

C) First unidirectional then bidirectional

D) Multidirectional

2 / 25

2) Factors affecting the rate of diffusion are _______?

1) Gradient of concentration
2) Permeability of the membrane
3) Temperature
4) Pressure
5) Size of diffusing material

A) 1, 2 and 5 are correct

B) 1 and 5 are correct

C) Only 5 is correct

D) 1, 2, 3, 4, 5 are correct

3 / 25

3) Which of the following is correct ?

A) Smaller substances diffuse faster

B) Hydrophilic substance cannot pass through cell membrane due to lipid present in the cell membrane

C) Diffusion is rapid over short distance but extremely slow over long distance

D) All

4 / 25

4) Facilitated diffusion _________?

A) Needs a carier protein

B) Is an active process

C) Occurs against the concentration gradient

D) Needs ATP

5 / 25

5) Which does not affect the rate of diffusion of a substance ______?

A) Temperature and concentration gradient

B) Electrical charges of the diffusing materials

C) Presence of the other substances in the solution

D) Molecular diameter of the diffusing materials

6 / 25

6) Transport substances across a membrane from an area of lower concentration to an area of higher concentration requires _______?

A) Energy

B) Phospholipid

C) Diffusion

D) Facilitated diffusion

7 / 25

7) Active transport is important because it can move molecules ________?

A) From their high concentration to a lower concentration

B) From their low concentration to a higher concentration

C) With less ATP than might otherwise be used to move molecules

D) By increasing their diffusing coefficient

8 / 25

8) Osmosis is a specific form of _________?

A) Active transport

B) Secondary active transport

C) Facilitated diffusion

D) Diffusion

9 / 25

9) Which of the following is correct about facilitated Active transport ?

A) Both need energy

B) Both need no ATP

C) Both use carbohydrate to move the molecules across the membrane

D) Both need carrier proteins which are sensitive to inhibitors that react with protein side chains

10 / 25

10) Water channel consists of how many type of aquaporins ?

A) 8

B) 88

C) 28

D) 18

11 / 25

11) Which one is highly selective ?

A) Simple diffusion active transport

B) Active transport and facilitated diffusion

C) Simple diffusion and facilitated diffusion

D) Active transport and passive transport

12 / 25

12) Which statement about the membrane channel is not true ?

A) They are proteins

B) Movement through them is along the concentration gradient

C) They are pores in the membrane

D) All ions pass through the same type of channel

13 / 25

13) Which of the following limits the movement of molecules when carrier mediated facilitated diffusion is involved ?

A) Concentration gradient

B) Availability of carrier molecules

C) Temperature

D) All of the above

14 / 25

14) Transport proteins that simultaneously move two molecules across a membrane in the same direction are called ?

A) Symport

B) Diffusive ports

C) Antiport

D) Uniport

15 / 25

15) Which of the following is not true of the carrier molecules involved in facilitated diffusion ?

A) They concentrate solute molecules on one side of the membrane

B) They increase the speed of transport across a membrane

C) They have specific binding sites for molecules they transport

D) Transport protein may undergo conformational change upon binding of solutes

16 / 25

16) A watermelon has how much water ?

A) More than 92 %

B) About 10 to 15 %

C) 100 %

D) 5 litres

17 / 25

17) Most herbaceous plants have how much dry weight of its total fresh weight ?

A) 10 - 15 %

B) 92 %

C) 50 %

D) 29 %

18 / 25

18) When different types of molecules in a fluid move together in response to a pressure gradient, this is called ________?

A) Joined response

B) Bulk flow

C) Facilitated diffusion

D) Pressured movement

19 / 25

19) The tendency of water to move towards greater solute concentration is the example of ______?

A) Active transport

B) Osmolarity

C) Diffusion

D) Passive transport

20 / 25

20) Water potential is ______?

A) Equal to solute potential

B) Equal to pressure potential

C) Equal to O. P.

D) A tendency of a solution to take up water from another solution across a membrane

21 / 25

21) Pressure on plant cell wall caused by osmotic movement of water is called _______?

A) O. P.

B) T. P.

C) Tonic pressure

D) Hypertonic pressure

22 / 25

22) O. P. of pure water is ______?

A) 1

B) 10

C) 100

23 / 25

23) Which of the following methods for transporting substances across a membrane does not involve a change in shape of transport protein ______?

A) Facilitated diffusion

B) Simple diffusion

C) Active transport

D) Na+ - K+ Pump

24 / 25

24) Water potential _____?

A) Of a solution is always greater that of pure H₂O

B) Of a solution is always zero

C) Of pure water is zero but of solution is always less than zero

D) Of a solution is alyays positive

25 / 25

25) If a pressure greater than atmospheric pressure is applied to pure water and a solution, it's " Ψw " value ?

A) Increases

B) Decreases

C) Remains constant

D) Will be equal to Ψp

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PLANT PHYSIOLOGY : TRANSPORT IN PLANTS 2

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