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
D. DPD
Correct Answer: (D)
Q25. Water potential of protoplasm is equal but opposite in sign to_________ and has negative value.
A. DPD
B. OPD
C. TP
D. WP
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.
A. ATP
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)