Plant Water Relation MCQS For MHT-CET 2023-2024.

 Plant Water Relation Subtopics for MHT-CET

  • Properties of water 
  • Water absorbing organ
  • Water available to roots for absorption 
  • Absorption of water by roots from soil 
  • Water potential 
  • Plasmolysis
  • Path of water across the root
  • Mechanism of absorption of water
  • Translocation of water 
  • Transport of mineral ions 
  • Transport of food
  • Transpiration 
  • Structural of stomatal apparatus 

Multiple Choice Question For Biology MHT-CET

Q1. Water has high:

A. Specific heat 
B. Heat of vaporization 
C. Heat of fusion 
D. All of these 
Correct Answer: (B)

Q2. Epiphytic plants like orchids absorb water vapours from air with the help of epiphytic roots having special tissue called:

A. Hydathodes
B. Velamen 
C. Phloem 
D. lenticels 
Correct Answer: (B)

Q3. How many regions are there in typical roots?

A. Four
B. Three 
C. Five 
D. Six 
Correct Answer: (B)

Q4. Root hair occurs in the zone of :

A. Cell division 
B. Cell elongation 
C. Cell maturation 
D. Absorption 
Correct Answer: (B)

Q5. In plants , maximum absorption of water takes place in the zone of:

A. Root apex
B. Root cap
C. Root hair 
D Meristematic tissue
Correct Answer: (B)

Q6. Cell wall of root hair is formed by which components?

A. Proteins 
B. Pectic compounds and cellulose 
C. Acidic compounds 
D. Starch
Correct Answer: (D)

Q7. Water present in the form of hydrated oxides of silicon ,aluminium,etc. is called:

A. Hygroscopic water
B. Capillary water 
C. Combined water
D. Chemical water
Correct Answer: (B)

Q8. Which type of water is available to the plants?

A. Hygroscopic water 
B. Gravitational water
C. Combined water
D. Capillary water
Correct Answer: (C)

Q9. Various physical processes involved in absorption of water are:

A. Imbibition 
B. Diffusion 
C. Osmosis 
D. All of these
Correct Answer: (D)

Q10. The initial stage of first step of water absorption by roots cells is:

A. Imbibition 
B. Adsorption 
C. Osmosis 
D. Desorption 
Correct Answer: (A)

Q11. Substance that absorbs water/liquid, is called as:

A. Absorbent 
B. Imbibate 
C. imbibant 
D. Both (B) and (C)
Correct Answer: (C)

Q12. Which of the following is/are hydrophilic substances?

A. Cellulose 
B. Pectic compounds 
C. Lipids 
D. Both (A) and (B)
Correct Answer: (D)

Q13. Dry seeds when placed in water swell due to:

A. Imbibition 
B. Absorption 
C. Diffusion
D. Adsorption 
Correct Answer: (C)

Q14. Wooden doors swell up and get stuck during the rainy season. This is due to the phenomenon of:

A. Imbibition 
B. Exo-osmosis 
C. Capillarity 
D. Deplasmolysis
Correct Answer: (C)

Q15. The movement of water from higher water potential to lower water potential through semi-permeable membrane is called:

A. Osmosis 
B. Diffusion 
C. Plasmolysis 
D. Imbibition 
Correct Answer: (A)

Q16. Hypotonic solution is called as:

A. Weak solution
B. Strong solution
C. Strong solvent
D. Both (A) and (C)
Correct Answer: (B)

Q17.  A cell increases in volume if the external medium is:

A. Hypotonic 
B. Hypertonic 
C. Isotonic 
D. None of these 
Correct Answer: (D)

Q18. __________ is the migration of solvent from the cell to outside.

A. Deplasmolysis 
B. Endo-osmosis
C. Exo-osmosis
D. Imbibition 
Correct Answer: (C)

Q19. A plant cell becomes turgid due to:

A. Plasmolysis
B. Exo-osmosis 
C. Endo-osmosis 
D. Electrolysis
Correct Answer: (B)

Q20. Which of the following term is now used to represent diffusion pressure deficit?

A. Osmosis 
B. Reverse osmosis 
C. Water potential 
D. Diffusion potential 
Correct Answer: (A)

Q21. Water enters root hair due to:

A. Elastic pressure 
B. Atmospheric pressure 
C. Osmotic pressure 
D. Turgor pressure
Correct Answer: (C)

Q22. The passive absorption of solutes when mediated by a carrier, is called:

A. Active diffusion 
B. Facilitated diffusion 
C. Imbibition
D. Deplasmolysis
Correct Answer: (B)

Q23. Special proteins required for facilitated diffusion are called:

A. Aquaporins 
B. Sporins
C. Ribosomal protein 
D. peptidoglycan 
Correct Answer: (B)

Q24. The chemical potential of water is known as:

A. Solute potential 
B. Water potential 
C. Diffusion pressure
Correct Answer: (D)

Q25. Water potential of protoplasm is equal but opposite in sign to_________ and has negative value.

Correct Answer: (B)

Q26. Which one is a unit of measurement of water potential?

A. Watt 
B. Joule 
C. Pascal 
D. Litre 
Correct Answer: (B)

Q27. Cytoplasm of adjacent cells are interconnected by:

A. Cortex 
B. Hydrostatic pressure
C. Adhesive force 
D. Plasmodesmata
Correct Answer: (C)

Q28. In symplast pathway water travels through:

A. Intercellular space 
B. Intracellular space 
C. Cytoplasmic bridges 
D. Nucleus 
Correct Answer: (D)

Q29. Casparian strips present in indo endodermal cells are made up of wax like substance called:

A. Solwax 
B. Suberin 
C. Porin 
D. Latex 
Correct Answer: (C)

Q30. ________ plays important role in passive absorption of water.

B. Transpiration pull 
C. Peptidoglycans 
D. Carrier molecules 
Correct Answer: (B)

Q31. Water in plants is transported by:

A. Cambium 
B. Phloem 
C. Xylem or xylem vessel elements 
D. Epidermis 
Correct Answer: (B)

Q32. Sap in Xylem flows out through cut end of well watered system of plant, this phenomenon is called:

A. Guttation 
B. Exudation 
C. Transpiration 
D. Exocytosis
Correct Answer: (B)

Q33. Root pressure can be measured by means of:

A. Porometer
B. Potometer
C. Auxanometer
D. Manometer
Correct Answer: (A)

Q34. Value of root pressure is +1 or +2 bars which is enough to pump water to a height of ______ metres.

A. 100 to 200
B. 80 to 100
C. 60 to 70
D. 10 to 20
Correct Answer: (A)

Q35. Cohesion and adhesion theory is otherwise called: 

A. Relay pump theory 
B. Pulsation theory 
C. Root pressure theory 
D. Transpiration pull theory 
Correct Answer: (A)

Q36. A strong force of attraction between water molecules and lignified wall of lumen of xylem vessel is called force of:

A. Cohesion 
B. Plasmolysis
C. Adhesion 
D. Osmosis
Correct Answer: (B)

Q37. Which of the following ion cannot be remobilized ?

A.  Phosphorus 
B. Calcium 
C. Sulphur 
D. Nitrogen  
Correct Answer: (C)

Q38. Translocation of food takes place through:

A. Meristem 
B. Xylem 
C. Phloem 
D. All cells 
Correct Answer: (B)

Q39. _________ are ideally suited for longitudinal translocation of food.

A. Sieve tubes 
B. Xylem vessels 
C. Xylem tracheids 
D. All of these
Correct Answer: (A)

Q40. Carbohydrates are stored in plants in the form of:

A. Starch 
B. Cellulose 
C. Maltose 
D. Glucose 
Correct Answer: (D)

Q41. Upward translocation of food occurs from:

A. Roots of fruits 
B. Leaves to root 
C. Leaves to growing point of stem 
D. Leaves to atmosphere
Correct Answer: (C)

Q42. Translocation of organic solutes from cells of pith to cortex is:

A. Upward 
B. Downward 
C. Radial 
D. Not possible 
Correct Answer: (C)

Q43. Phloem sap contains:

A. Sugar 
B. Amino acid 
C. Hormones 
D. All of these 
Correct Answer: (B)

Q44. _________ proposed the most convincing theory explaining mechanism of sugar transplant through phloem.

A. Priestley 
B. Munch 
C. Steward 
D. Curtis 
Correct Answer: (D)

Q45. Munch hypothesis explains that at _______ root cell utilises sugar.

A. Sink end 
B. Tracheids 
C. Source end 
D. Both (A) and (B)
Correct Answer: (B)

Q46. The ultimate case for the movement of water against gravity in tree is:

A. Photosynthesis 
B. Osmosis
C. Transpiration 
D. Imbibition 
Correct Answer: (B)

Q47. __________ of total water absorbed by roots is utilised for cell expansion and plant growth.

A. 0.1%
B. 95%
C. 5%
D. 80%
Correct Answer: (D)

Q48. The phenomenon of removal of water in liquid phase through intact plant part called:

A. Bleeding 
B. Exudation 
C. Transpiration pull 
D. Guttation 
Correct Answer: (D)

Q49. Hydathodes are also called:

A. Water stomata
B. Sunken stomata 
C. Guard cells 
D. Subsidiary cells
Correct Answer: (A)

Q50. Maximum transpiration takes place from:

A. Stem 
B. Leaves 
C. Roots 
D. Flowers and fruits 
Correct Answer: (B)

                                              THANKS FOR VISITING !

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