Transport in Plants Class 11 NEET Previous Year Questions
Transport in Plants Class 11 Questions And Answers
AIPMT 2006
1. The translocation of organic solutes in sieve tube members is supported by
(1) Mass flow involving a carrier and ATP
(2) Cytoplasmic streaming
(3) Root pressure and transpiration pull
(4) P-proteins
Solution: Correct option is 1
AIPMT 2007
2. Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will be :
(1) Equilibrium between the two
(2) Movement of water from cell A to B
(3) Movement of water from cell B to A
(4) No movement of water
Solution: Correct option is 2
AIPMT 2008
3. Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (a–e) make it useful as a storage material ?
(a) Easily translocated
(b) Chemically non-reactive
(c) Easily digested by animals
(d) Osmotically inacitve
(e) Synthesized during photosynthesis
The useful properties are :-
(1) (a), (c) and (e)
(2) (a) and (e)
(2) (b) and (c)
(4) (b) and (d)
Solution: Correct option is 4
AIPMT 2009
4. Guard cells help in :
(1) Transpiration
(2) Guttation
(3) Fighting against infection
(4) Protection against grazing
Solution: Correct option is 1
AIPMT-Mains 2010
5. Given below is the diagram of a stomatal apparatus.
In which of the following all the four parts labelled as
A, B, C and D are correctly identified ?
Solution: Correct option is 3
AIPMT-Pre 2011
6. In land plants, the guard cells differ from other epidermal cells in having :
(1) Cytoskeleton
(2) Mitochondria
(3) Endoplasmic reticulum
(4) Chloroplasts
Solution: Correct option is 4
AIPMT-Mains 2011
7. Guttation is the result of :
(1) Root pressure
(2) Diffusion
(3) Transpiration
(4) Osmosis
Solution: Correct option is 1
8. Function of companion cells is :
(1) Loading of sucrose into sieve elements.
(2) Providing energy to sieve elements for active transport.
(3) Providing water to phloem
(4) Loading of sucrose into sieve elements by passive transport
Solution: Correct option is 1
NEET-UG 2013
9. Which of the following criteria does not pertain to facillitated transport ?
(1) Uphill transport
(2) Requirement of special membrane proteins
(3) High selectivity
(4) Transport saturation
Solution: Correct option is 1
AIPMT 2014
10. The osmotic expansion of a cell kept in water is chiefly regulated by :
(1) Mitochondria
(2) Vacuoles
(3) Plastids
(4) Ribosomes
Solution: Correct option is 2
AIPMT 2015
11. In a ring girdled plant:
(1) The root dies first
(2) The shoot and root die together
(3) Neither root nor shoot will die
(4) The shoot dies first
Solution: Correct option is 1
12. Transpiration and root pressure cause water to rise in plants by :
(1) Pulling and pushing it, respectively
(2) Pushing it upward
(3) Pushing and pulling it, respectively
(4) Pushing it upward
Solution: Correct option is 1
Re-AIPMT 2015
13. Root pressure develops due to :
(1) Increase in transpiration
(2) Active absorption
(3) Low osmotic potential in soil
(4) Passive absorption
Solution: Correct option is 2
14. A column of water within xylem vessels of tall trees does not break under its weight because of :
(1) Positive root pressure
(2) Dissolved sugars in water
(3) Tensile strength of water
(4) Lignification of xylem vessels
Solution: Correct option is 3
NEET-I 2016
15. Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of following option :
(1) Both processes cannot happen simultaneously.
(2) Both processes can happen together because
the diffusion coefficient of water and CO2 is different.
(3) The above processes happen only during night time.
(4) One process occurs during day time, and the other at night.
Solution: Correct option is 2
16. Specialised epidermal cells surrounding the guard cells are called :
(1) Complementary cells
(2) Subsidiary cells
(3) Bulliform cells
(4) Lenticels
Solution: Correct option is 2
NEET-II 2016
17. A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap ?
(1) Low refractive index
(2) Absence of sugar
(3) Acidic
(4) Alkaline
Solution: Correct option is 4
NEET(UG) 2017
18. Which of the following facilitates opening of stomatal aperture ?
(1) Decrease in turgidity of guard cells
(2) Radial orientation of cellulose microfibrils in the cell wall of guard cells
(3) Longitudinal orientation of cellulose microfibrils
in the cell wall of guard cells
(4) Contraction of outer wall of guard cells
Solution: Correct option is 2
19. The water potential of pure water is :
(1) Less than zero
(2) More than zero but less than one
(3) More than one
(4) Zero
Solution: Correct option is 4
NEET(UG) 2018
20. Stomatal movement is not affected by :
(1) Temperature
(2) Light
(3) O2 concentration
(4) CO2 concentration
Solution: Correct option is 3
NEET(UG) 2019
21. Xylem translocates :
(1) Water only
(2) Water and mineral salts only
(3) Water, mineral salts and some organic nitrogen only
(4) Water, mineral salts, some organic nitrogen and hormones
Solution: Correct option is 4
22. What is the direction of movement of sugars in phloem?
(1) Non-multidirectional
(2) Upward
(3) Downward
(4) Bi-directional
Solution: Correct option is 4
NEET(UG) 2019 (Odisha)
23. The main difference between active and passive transport across cell membrane is :-
(1) Passive transport is non-selective whereas active transport is selective
(2) Passive transport requires a concentration gradient across a biological membrane whereas active transport requires energy to move solutes
(3) Passive transport is confined to anionic carrier proteins whereas active transport is confined to cationic channel proteins
(4) Active transport occurs more rapidly than passive transport
Solution: Correct option is 2
24. Which of the following is not a feature of active transport of solutes in plants ?
(1) Occurs against concentration gradient
(2) Non-selective
(3) Occurs through membranes
(4) Requires ATP
Solution: Correct option is 2
25. What will be the direction of flow of water when a plant cell is placed in a hypotonic solution ?
(1) Water will flow in both directions
(2) Water will flow out of the cell
(3) Water will flow into the cell
(4) No flow of water in any direciton
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