InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
Osmosis is the diffusion ofA. SoluteB. Free energyC. WaterD. Solute and solvent |
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Answer» Correct Answer - C |
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| 502. |
Which of the following statements is correct ?A. Cells shrink in hypertonic solution and swell in hypotonic solution.B. Imbibition is a special type of diffusion when water is absorbed by non living parts.C. Most of water flow in the roots occur via the apoplast.D. all of these. |
| Answer» Correct Answer - D | |
| 503. |
Which of the following statements is correct?A. Bacteria do not survive in salted pickles because they get plasmolysed in hypertonic medium.B. Osmotic potential is numerically equal ot the osmotic pressure but is negative in sigh.C. Kneading of wheat flour is accompanied by release of heat which is due to imbibitionD. all of these. |
| Answer» Correct Answer - D | |
| 504. |
In biological system, the term osmosis involves the diffusion ofA. WaterB. SolutesC. EnergyD. Both A and B. |
| Answer» Correct Answer - A | |
| 505. |
Endosmosis takes place when a plant cell is immersed inA. Isotonic solutionB. Hypotonic solutionC. Hypertonic solutionD. HCL solution. |
| Answer» Correct Answer - B | |
| 506. |
Best soil for healthy and vigorous growth of a plant isA. Sandy soilB. LoamC. ClayD. None of these |
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Answer» Correct Answer - B |
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| 507. |
Water potential and osmotic potential of pure water areA. 100 and 200B. Zero and 100C. 100 and zeroD. zero and zero |
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Answer» Correct Answer - D |
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| 508. |
Give three important features of active transport |
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Answer» (i) Active t ransport uses energy to carry substances across the cell memebrane (ii) Active transport involves paritciplatin of carrier proteins these proteins are very speicific and sensitive to inhibitors (ii) Active transport occurs against concetration gradient |
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| 509. |
Give the protperites common between facillitated diffusion and active transport |
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Answer» Both the facilitated diffusion and active transport shown the following commo properites (i) Requirement of special membrane protens (ii) They ar highly selective ltbgt (ii) The transproteation is liable to saturate (iv) They repsot to enzyme inhibitors |
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| 510. |
In the process of osmosis, volume of solventA. IncreasesB. DecreasesC. Remain sameD. Volume is not related in osmosis |
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Answer» Correct Answer - C |
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| 511. |
What is facillitated diffuseion? How do large molecules or ions pass through outer membrnes of plastids and mitochondria? |
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Answer» Facilitated diffusion is the spontaeous pasage of molecules or ions across a biological miembrance mediated by specific transmembrane carrier proteins without involving the expenditure of metabolic energy Large transproter proteins (proins) create huge proes inthe outer membrances of plastids mitochondria and bactieria to provide passage for transproteation of large molecules or ions |
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| 512. |
Plant obtain their hydrogen repuriement fromA. Water in the soilB. Minerals in the soilC. `CO_(2)` in the atmosphereD. All of the above |
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Answer» Correct Answer - A Plant obtian their hydrogen requirement from watert in the soil |
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| 513. |
In the process of plasmolysisA. Endosmosis occursB. Exosmosis occursC. Imbibition occursD. Diffusion occurs |
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Answer» Correct Answer - B |
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| 514. |
Plant obtain their carbon and most of their oxygen fromA. Water in the soilB. Minerals in the soilC. `CO_(2)` in the atmosphereD. All of the above |
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Answer» Correct Answer - C Plat obtain their carbon and most of their oxygen from `CO_(2)` in the atmosphere |
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| 515. |
The process by which large molecules move out of the cell is calledA. PlasmolysisB. DeplasmolysisC. PhagocytosisD. Reverse phagocytosis |
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Answer» Correct Answer - D |
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| 516. |
In plants capillarity is aided by theA. Small diameter of vesselsB. Large diameter of tracheidsC. Small diameter of tracheidsD. Both A and C |
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Answer» Correct Answer - D In plants capillarity is aidded by the small diameter of tracheary elements (xylem tracheids and vessel) |
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| 517. |
The initial stage of water absorption by root cells is by Dry seeds when placed in water swells due toA. AdsoptionB. AbsorptionC. OsmosisD. Imbibition |
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Answer» Correct Answer - D |
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| 518. |
dry seeds, when placed in water sell up due toA. ImbibitionB. AbsorptionC. DiffustionD. Adsorption |
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Answer» Correct Answer - A Dry seeds when placed in water swell up due to imbition |
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| 519. |
The pressure shown in the figure is called A. Osmotic potentialB. Osmotic pressureC. Turgor pressureD. Suction pressure |
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Answer» Correct Answer - B The pressure shown in the figure is called osmotic pressure |
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| 520. |
Soil formed after leaching and rich in Al and Fe isA. AlluvialB. PodosolC. LateriteD. None of these |
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Answer» Correct Answer - C |
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| 521. |
During stomatal opening (photo-active) which does not occur?A. Increase in pH of guard cellsB. Hydrolysis of starch in guard cellsC. Increased TP of subsidiary cellsD. Dissociation of malic acid in guard cells |
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Answer» Correct Answer - C |
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| 522. |
In `"________"` pathway, water crosses atg least two membranes for each cell in its path `i.e.,` plasma membrane on entering and ecxiting).A. ApoplastB. symplastC. transmembraneD. both `(a)` and `(c)` |
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Answer» Correct Answer - C The transmembrane (or vacuolar ) pathway is the route followed by water that sequentially enters a cell on one side exits the cell on the other side enters the next in the series and so on. In this pathway water crosses at least two membrane for each cell in its path (the plasma membrane on entering and on exiting). |
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| 523. |
Almost all biological membranes allow some specific substances to pass through them. Thus, these are known asA. semipemeableB. impermeableC. differentially permeableD. permeable |
| Answer» Correct Answer - C | |
| 524. |
Define water potential and solute potential. |
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Answer» Water potential is a measure of free energy associated with water per unit volume `(JM^(-3))`. The water potential of pure water `(Psi_(w))` at atmospheric pressure is zero. The unit of water potential is bars or Pascal (1m Pa=10 bars). solute Potential The addition of solutes reduce water potential (to a negative value). This reduces the concentration of water. Hence, solutions have a lower water potential than pure water, the magnitude of this lowering due to dissolution of a solute is called solute potential or `Psi_(s)`. |
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| 525. |
Why is solute potential always negative ? Explain `Psi_(w)=Psi_(s)+Psi_(p)`. |
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Answer» If some solute is dissolved in pure water, solution has fewer free water molecules and the concentration of water decreases, reducing its water potential. Hence, all the solution have a lower water potential than pure water. The magnitude of this lowering is due to dissolution of solute is called solute potential or `Psi_(s). Psi_(s)` is always negative. The more the solute molecules, the lower (more negative) is the solute potential `Psi_(s)` water potential of a cell is affected by both solute and pressure potential. The relationship can be illustrated as `{:(,Psi_(w)=Psi_(s)+Psi_(p)),("Where,",Psi_(w)="Water potential,"),(,Psi_(s)="solute potential,"),(,Psi_(p)="pressure potential"):}` |
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| 526. |
If some solute is dissolved in pure water, its water potentialA. remains sameB. increasesC. decreasesD. first decreases then increases. |
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Answer» Correct Answer - C The water potential of a solution can be determined using pure water as the standard of reference. The pure water, at atmospheric pressure, has a water potential of zero (0). The presence of solute particles reduces the free energy of water and thus decreases the water potential (negative value). Because of this, the water potential of a solution is always less the zero. |
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| 527. |
If `Psih_(w)=` water potential, `Psi_(s)=` solute potential, `Psi_(p)=` pressure potential then select the correct equation showing their inter-relation.A. `Psi_(w)=Psi_(s)-Psi_(rho)`B. `Psi_(w)=Psi_(s)+Psi_(rho)`C. `Psi_(s)=Psi_(w)+Psi_(rho)`D. `Psi_(w)=Psi_(s)=Psi_(rho)` |
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Answer» Correct Answer - B `psi_(w) = psi_(s) + psi_(p)` Where `psi_(w) =` water potential, `psi_(s) =` solute potential and `psi_(p) =` pressure potential. |
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| 528. |
A plant organ having high concentration of food , will serve as aA. SourceB. SinkC. Conducting tissueD. Plasmodesmata |
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Answer» Correct Answer - A |
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| 529. |
Which of the following substances find itself difficult to pass through the membrane ?A. LipophilicB. HydrophilicC. HydrophobicD. Both A and C |
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Answer» Correct Answer - B Hydrophilic substance finds itself difficult to pass through the membrane as it is not lipid soluble. |
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| 530. |
Water potential of soil quantified in term ofA. PressureB. VolumeC. Molar concentrationD. Molal concentration |
| Answer» Correct Answer - C | |
| 531. |
Which is wrongA. Water potential is chemical potential of waterB. Solute potential is always negativeC. Pressure potential is zero in a flaccid cellD. Water potential equal solute potential in a fully turgid cell |
| Answer» Correct Answer - D | |
| 532. |
Identify the wrong statementA. The degree of decrease of chemical potential of water depends on concentration of soluteB. Bacteria and fungal spores are killed when they enter into pickles and jams dues to plasmoysisC. Process of water exudation is called transpirationD. Reverse plasmoysis will occur when flaccid cells are placed in hypotonic solution |
| Answer» Correct Answer - C | |
| 533. |
Endosmosis of water occurs when water potenial of the cell sap isA. HigherB. EqualC. LowerD. None of the above |
| Answer» Correct Answer - C | |
| 534. |
The hydrostatic pressure developed inside the cell on the cell wall due to endosmosis is calledA. Wall pressureB. Osmotic pressureC. Suction pressureD. Turgor pressure |
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Answer» Correct Answer - D The hydrostatic pressure developed within a plant cell through osmosis and/or imbibition when exerted on its wall is turgor pressure. |
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| 535. |
As a result of endosmosis , `Psi_(W)` of cellA. IncreaseB. DecreaseC. Remain sameD. Become zero |
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Answer» Correct Answer - A |
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| 536. |
Which of the following equation is wrong ?A. `Psi_(s)=-pi`B. DPD=-OP+TPC. `Psi_(W)=Psi_(S)+Psi_(P)`D. `Psi_(W)=-DPD` |
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Answer» Correct Answer - B |
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| 537. |
For a solution at atmospheric pressure , `Psi_(W)` is equivalent toA. `Psi_(P)`B. `Psi_(S)`C. ZeroD. TP |
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Answer» Correct Answer - B |
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| 538. |
Phenomenon of plasmolysis can be exploited forA. causing plasmolysis of microbes in highly salted picklesB. Preventing growth of microbes in jams and jelliesC. Elimination of weedsD. All of these |
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Answer» Correct Answer - D |
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| 539. |
Ascent of sap is best explained byA. mass (bulk) flowB. pulsation theoryC. root pressureD. cohesion-tension transpiration pull. |
| Answer» Correct Answer - D | |
| 540. |
Tracheids are less efficient than vessels due toA. Absence of closed and wallsB. Uneven thickeningsC. Casparian stripsD. Presence of tapering end walls |
| Answer» Correct Answer - D | |
| 541. |
Which one is most efficient imbibant ?A. PectinB. AgerC. CelluloseD. Lignin |
| Answer» Correct Answer - B | |
| 542. |
Which of the following substance acts as best imbibant ?A. PhycocolloidsB. ProteinsC. StarchD. Cellulose |
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Answer» Correct Answer - A |
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| 543. |
Give an example of imbibant and imbibate . |
| Answer» An example of imbibabt is " seed " and imbibate at "water" . | |
| 544. |
State the relationship between water potential and solute potential for a solution at atmospheric pressure . |
| Answer» For a solution ,( at atmospheric pressure ) Water potential `(Psi_(w))`= Solute potential `(Psi_(S))` | |
| 545. |
Value of osmotic potental `(pi)` and pressure potential (p) of cells a, b, c, d are given `{:("cell " , pi ,"p" ),(a,-1.0,0.5),(b,-0.6,0.3),(c,-1.2,0.6),(d,-0.8,0.4):}` Identify the correct sequence for movement of waterA. `b to c to d to a `B. `c to b to a to d `C. `d to c to a to b `D. `b to d to a to c ` |
| Answer» Correct Answer - D | |
| 546. |
Transpiration is mainly a process ofA. ImbibitionB. RespirationC. Osmotic pressureD. Diffusion |
| Answer» Correct Answer - D | |
| 547. |
What is the unit of water potential ? |
| Answer» Correct Answer - Pascal(Pa) | |
| 548. |
What is water potential ? |
| Answer» It refers to the free energy of water which helps in the movement of water between any two systems. | |
| 549. |
Terrestrial plants take up huge amount of water daily but most of it is lost to the air throughA. PhotosynthesisB. RespirationC. TranspirationD. Translocation |
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Answer» Correct Answer - C Terrestrial plants take up huge amount water daily but most of it is lost the air through transpiration |
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| 550. |
Identify the correct statements and find out the correct combination ? 1. Accumlation of `K^(+)` ions in guard cells does not require energy 2. A high pH favours stomatal opening 3. Movemant of chloride ions into guard cells is in response to electrical differential created by `K^(+)` ions 4. With entry of several `K^(+)`ions and chloride ions, water potential of guard cells increases .A. 1 and 3B. 1 and 2C. 2 and 3D. 3 and 4 |
| Answer» Correct Answer - C | |