McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: All India Pre Medical Test (AIPMT) .
Chapters
| 1. |
Match A and B :
|
| A. | (v) (iii) (i) (iv) |
| B. | (i) (ii) (iii) (v) |
| C. | (v) (ii) (i) (iv) |
| D. | (iii) (v) (ii) (i) |
| Answer» C. (v) (ii) (i) (iv) | |
| 2. |
The pressure at which the entry of water across the semipermiable membrane stops is called ..... |
| A. | Turgor pressur |
| B. | Root pressure |
| C. | Osmotic pressure |
| D. | Diffusion pressure |
| Answer» C. Osmotic pressure | |
| 3. |
What happens in this figure ? |
| A. | Water from beaker will enter the thistle funnel. |
| B. | Water from thistle funnel will enter in the beaker. |
| C. | Nacl enter from beaker to thistle funnel. |
| D. | Osmosis does not occur. |
| Answer» D. Osmosis does not occur. | |
| 4. |
A .......... force exists between the walls of xylem vessels and water. |
| A. | Cohesion |
| B. | Gravitational |
| C. | Adhesive |
| D. | Transpiration pull |
| Answer» C. Adhesive | |
| 5. |
The process by which water is forcibly pushed beyond endodermis of root is known as ......... . |
| A. | Apoplast pathway |
| B. | Symplast pathway |
| C. | Diffusion |
| D. | Transmembrane transport |
| Answer» D. Transmembrane transport | |
| 6. |
By which type of transpiration largest amount of water is lost ? |
| A. | Guttation |
| B. | Cuticular |
| C. | Stomata |
| D. | Lenticular |
| Answer» C. Stomata | |
| 7. |
The value of osmotic pressure depends on .......... . |
| A. | Concentration of solute |
| B. | Concentration of solvent |
| C. | Concentration of solution |
| D. | Concentration of substrate |
| Answer» C. Concentration of solution | |
| 8. |
If the external solution is more dilute than the cytoplasm is known as .......... . |
| A. | Hypertonic |
| B. | Hypotonic |
| C. | Isotonic |
| D. | ‘a’ and ‘b’ both |
| Answer» B. Hypotonic | |
| 9. |
Membrane protein is responsible for transport of |
| A. | Water molecule |
| B. | Transpiration of H2O |
| C. | Active transport |
| D. | Passive transport |
| Answer» C. Active transport | |
| 10. |
The +ve value of Ψ P is called .......... |
| A. | Osmotic pressure |
| B. | Root pressure |
| C. | Turgor pressure |
| D. | Imbibation pressure |
| Answer» C. Turgor pressure | |
| 11. |
What happens in this figure ? |
| A. | Exo osmosi |
| B. | Endo osmosis |
| C. | Cell swollen |
| D. | Cell remain in same condition |
| Answer» D. Cell remain in same condition | |
| 12. |
In older dying leaves to younger leaves the mineral ions are assimilated into .......... . |
| A. | In organic compound |
| B. | Organic compound |
| C. | Deposition of Inorganic compound and organic compou |
| Answer» B. Organic compound | |
| 13. |
Which elements are readily mobilized in plants ? |
| A. | S, N, Mo |
| B. | K, N, Mo |
| C. | P, S, N |
| D. | S, N, B |
| Answer» C. P, S, N | |
| 14. |
In term of fixing CO2, C4 plants are .......... efficient as C3 plants. |
| A. | Thrice |
| B. | Twice |
| C. | Less |
| D. | Not |
| Answer» B. Twice | |
| 15. |
When a cell is placed in 0.50M concentrated sugar solution, there is no change in it. So the external solution is called .......... . |
| A. | Hypertonic |
| B. | Isotonic |
| C. | Hypotonic |
| D. | Colloidal |
| Answer» B. Isotonic | |
| 16. |
The pressure that prevails in cell due to number of substances dissolved in cell sap is .......... . |
| A. | Wall pressure |
| B. | Turgor pressure |
| C. | Osmotic pressure |
| D. | Diffusion pressure |
| Answer» C. Osmotic pressure | |
| 17. |
The plasmolysed cells regain turgidity and assume original volume under infuence of hypotonic solution. The process is called |
| A. | Plasmolysi |
| B. | Deplasmolysis |
| C. | Endo osmosis |
| D. | Exo osmosis |
| Answer» B. Deplasmolysis | |
| 18. |
An animalcell placed in pure water will |
| A. | Swell up and brust |
| B. | Shrink and die |
| C. | Shrink and undergo plasmolysis |
| D. | Swell up and develop turgidity |
| Answer» A. Swell up and brust | |
| 19. |
Passage of water across a selectively permeable membrane is |
| A. | Active transport |
| B. | Pinocytosis |
| C. | Facilitated difusion |
| D. | Osmosis |
| Answer» D. Osmosis | |
| 20. |
Seeds placed in water imbibe the water becasue of |
| A. | Exosmosi |
| B. | Higher Ψ W |
| C. | Lower Ψ W |
| D. | Pressure of vacuoles |
| Answer» C. Lower Ψ W | |
| 21. |
In thistle funnel experiment, entry of water into thistle funnel stops after some time automatically due to |
| A. | Diffusion of sugar out of thistle funnel. |
| B. | External and internal solutions become isotonic. |
| C. | Development of hydrostatic pressure in the thistle funnel. |
| D. | Development of hydrostatic pressure in the beaker. |
| Answer» C. Development of hydrostatic pressure in the thistle funnel. | |
| 22. |
In plants the process in which loss of water occurs in form of water vapour is |
| A. | Respiration |
| B. | Guttation |
| C. | Transpiration |
| D. | Exosmosis |
| Answer» C. Transpiration | |
| 23. |
Stomatal aperature is surrounded by guard cells and opens when guard cells are |
| A. | Flaccid |
| B. | Turgid |
| C. | Bean shaped |
| D. | Dumb-bell shaped |
| Answer» B. Turgid | |
| 24. |
Stomatal frequency indicates. |
| A. | Number of stomata per unit area |
| B. | Rate of water loss |
| C. | Rate of gaseous exchange |
| D. | Width of stomatal aperature |
| Answer» A. Number of stomata per unit area | |
| 25. |
In dorsiventral leaf, the number of stomata per unit area are generally. |
| A. | Same on both the surface |
| B. | More on lower surface (epidermis) |
| C. | More on upper surface (epidermis) |
| D. | Absent on upper surface |
| Answer» B. More on lower surface (epidermis) | |
| 26. |
In isobilateral leaf, the number of stomata per unit area are. |
| A. | More on upper surface |
| B. | More on lower surface |
| C. | Approximately same on both the surfaces |
| D. | Absent on both the surfaces |
| Answer» C. Approximately same on both the surfaces | |
| 27. |
The loss of water in form of water drops is called. |
| A. | Transpiration |
| B. | Respiration |
| C. | Guttation |
| D. | Exosmosis |
| Answer» C. Guttation | |
| 28. |
Transpiration is unavoidable evil because of |
| A. | Structure of leaf and harmful effect |
| B. | Beneficial and harmful effect. |
| C. | Maintenance of turgidity for growth |
| D. | Gaseous exchange for photosynthesis and respiration |
| Answer» D. Gaseous exchange for photosynthesis and respiration | |
| 29. |
Plants with scotoactive stomata perform |
| A. | C4 photosynthesi |
| B. | CAM photosynthesis |
| C. | C3 photosynthesis |
| D. | An oxygenic photosynthesis |
| Answer» B. CAM photosynthesis | |
| 30. |
For keeping stomata open, besides K+ ions the guard cells require a constant supply of |
| A. | ABA |
| B. | ATP |
| C. | Organic acid |
| D. | Protons |
| Answer» B. ATP | |
| 31. |
Transpiration is a process related to |
| A. | Osmosi |
| B. | Diffusion |
| C. | Activated transport |
| D. | Facilitated diffusion |
| Answer» B. Diffusion | |
| 32. |
Rate of transpiration is inversely related to |
| A. | Humidity |
| B. | Light |
| C. | Temperature |
| D. | Water |
| Answer» A. Humidity | |
| 33. |
Scotoactive movement of stomata is that |
| A. | Stomata open at night |
| B. | Stomata open during day |
| C. | Stomata close at night |
| D. | Stomata open both during day and night |
| Answer» A. Stomata open at night | |
| 34. |
The most effective light for stomatal opening is_____________ |
| A. | Yellow |
| B. | Green |
| C. | Red |
| D. | Blue |
| Answer» D. Blue | |
| 35. |
During high wind velocity, the stomata |
| A. | open more widely |
| B. | Close down |
| C. | Remian unaffected |
| D. | Remain unaffected but lose more water due to mass action |
| Answer» B. Close down | |
| 36. |
Cobalt chloride is blue in dry state. In contact with moisture, it turns in to |
| A. | Yellow |
| B. | Pink |
| C. | Red |
| D. | Green |
| Answer» B. Pink | |
| 37. |
The maximum absorption of water by roots occurs in the (region) zone of |
| A. | Root cap |
| B. | Cell division |
| C. | Cell elongation |
| D. | Root hairs |
| Answer» D. Root hairs | |
| 38. |
The movement of water is along |
| A. | Turgor gradien |
| B. | DPD gradient |
| C. | Diffusion gradient |
| D. | Osmotic gradient |
| Answer» B. DPD gradient | |
| 39. |
As absorbed water passes towards vascular cylinder, it must enter the cytoplasm of |
| A. | Pericycle cell |
| B. | Endodermal cells |
| C. | Cortical cells |
| D. | Xylem parenchyma |
| Answer» B. Endodermal cells | |
| 40. |
Water tightly held to soil particles is called (EAMCET 1996) |
| A. | Bound water |
| B. | Capillary water |
| C. | Hygroscopic water |
| D. | Runaway water |
| Answer» C. Hygroscopic water | |
| 41. |
The phenomenon which forces water upward into tracheal elements of xylem in the root region is |
| A. | Transpiration |
| B. | Root pressure |
| C. | Turgor pressure |
| D. | Imbibation pressure |
| Answer» B. Root pressure | |
| 42. |
Force for passive water absorption develops in |
| A. | Xylem |
| B. | Aerial parts |
| C. | Root |
| D. | Root hairs |
| Answer» B. Aerial parts | |
| 43. |
The phenomenon related to active water absorption is |
| A. | Transpiration |
| B. | Root pressure |
| C. | Osmotic pressure |
| D. | Translocation |
| Answer» B. Root pressure | |
| 44. |
Root pressure can be demonstrated by means of |
| A. | wilting |
| B. | Guttation |
| C. | Transpiration |
| D. | Exudation |
| Answer» D. Exudation | |
| 45. |
Root pressure theory of ascent of sap is unacceptable because |
| A. | Water can ascend without root or root pressure |
| B. | Root pressure cannot explain ascent of sap beyond 10 metres. |
| C. | Root pressure is more during early morning than afternoon. |
| D. | Root pressur does not occur in spring. |
| Answer» A. Water can ascend without root or root pressure | |
| 46. |
Transpiration cohesion theory explains that the upwards pull of water is transmitted from top to bottom by cohesion of molecules caused by |
| A. | Hydrophilic cell wall |
| B. | Hydrogen bonds |
| C. | Oxygen bonds |
| D. | Surface tension |
| Answer» B. Hydrogen bonds | |
| 47. |
Root pressure is unable to explain the ascent of sap because it is not found in |
| A. | Bryophyte |
| B. | All plants in all reasons |
| C. | Trees |
| D. | Spring |
| Answer» A. Bryophyte | |
| 48. |
Ascent of sap is |
| A. | Upward movement of water in the plant |
| B. | Downward movement of organic nutrients |
| C. | Upward and downward movement of water in the plant |
| D. | Redistribution of inorganic substances in the plant |
| Answer» D. Redistribution of inorganic substances in the plant | |
| 49. |
In xylem, the ascent of sap takes place in |
| A. | Tracheids with associated xylem parenchyma |
| B. | Xylem parenchyma |
| C. | Walls of tracheary elements |
| D. | Lumen of tracheary elements |
| Answer» B. Xylem parenchyma | |
| 50. |
Swelling of wooden frames during rains is caused by |
| A. | Endo osmosi |
| B. | Imbibation |
| C. | Capillarity |
| D. | Osmosis |
| Answer» A. Endo osmosi | |
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