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.
| 851. |
See the following diagram Initially solution in side A, with respect to side B, is A. LowerB. IsotonicC. HypertonicD. Hypotonic |
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Answer» Correct Answer - B |
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| 852. |
Pressure bomb technique was used byA. Scholander et alB. Kramer et alC. Dixon et alD. None of the above |
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Answer» Correct Answer - A |
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| 853. |
Which of the following is more during the nightA. Root pressureB. AbsorptionC. EvaporationD. Transpiration |
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Answer» Correct Answer - A |
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| 854. |
Stomata that can also open at night, present inA. xerophytesB. gametophytesC. hydrophytesD. None of the above |
| Answer» Correct Answer - A | |
| 855. |
Which one of the following statements is wrongA. Water potential is the chemical potential of the waterB. Solute potential is always negativeC. Pressure potential is zero in a flaccid cellD. Water potential equals solute potential n a fully turgid cell |
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Answer» Correct Answer - A |
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| 856. |
Hydathodes are also calledA. Water stomataB. Sunken stomataC. Guard cellsD. Subsidiary cells |
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Answer» Correct Answer - A |
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| 857. |
What will be the effect of accumulation of `K^(+)` ions in guard cellsA. Water potential increasesB. Water potential decreasesC. Loss of turgidityD. Exomosis |
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Answer» Correct Answer - B |
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| 858. |
Which one is not related to transpirationA. Regulation of plant body temperatureB. Absorption and distribution of mineral saltsC. Circulation of waterD. Bleeding |
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Answer» Correct Answer - D |
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| 859. |
Risk of spoilage is less in salted pickles as it causesA. GuttationB. ImbibitionC. DiffusionD. Plasmolysis |
| Answer» Correct Answer - D | |
| 860. |
In the given diagram |
| Answer» Correct Answer - Cell B | |
| 861. |
If the external solution balances the osmotic pressure of the cytoplasm ,it is said to be _________ |
| Answer» Correct Answer - Isotonic | |
| 862. |
In hypertonic solution a cell water potentialA. shows no changeB. first increase and then decreaseC. increasesD. decreases |
| Answer» Correct Answer - D | |
| 863. |
Name the pore through which guttation takes place |
| Answer» Correct Answer - Hydrathode | |
| 864. |
The water potential of pure water isA. less than zeroB. more htan zero but less than oneC. more than oneD. zero |
| Answer» Correct Answer - d | |
| 865. |
Water soluble pigments found in plant cell vacuoless areA. chlorophyllsB. carotenoidsC. anthocyanineD. xanthophylls |
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Answer» Correct Answer - c Hi... your answer will be option C ANTHOCYANINE |
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| 866. |
Specialised epidermal cells surrounding the guards cells are calledA. subsidiary cellsB. bulliform cellsC. lenticlelsD. complementary cells |
| Answer» Correct Answer - a | |
| 867. |
Refer to the given figure and identify cell `A,B`and `C`. A. `A-"Plasmolysed:B-Flaccid,C-Turgid"`B. `A-"Flaccid,B-Turgid,C-Plasmolysed"`C. `A-"Turgid,B-Plasmolysed,C-Flaccid"`D. `A-"Turgid,B-Flaccid,C-Plasmolysed"` |
| Answer» Correct Answer - A | |
| 868. |
In the resting state of the neutral membrane, diffusion due to concentration gradients, if allowed would drive.A. `K^(+)` into the cellB. `K^(+) " and " Na^(+)` out of the cellC. `Na^(+)` into the cellD. `Na^(+)` out of the cell |
| Answer» Correct Answer - C | |
| 869. |
The practice of breaking of rocks during rainy season by inserting wooden pegs in them is based on the phenomenon ofA. imbibition pressureB. turgor pressureC. osmosis pressureD. wall pressure |
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Answer» Correct Answer - A Imbibition pressure generated during germination of seeds and spores is so enormous that it can break asphalt roads and concrete pavements. In older times, the imbibition pressure was used in breaking the rocks and stones Dry wooden stakes If driven into a small crack in a rock and then soaked can develop enough pressure to split the rock. |
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| 870. |
The practice of breaking of rocks during rainy season by inserting wooden pegs in them is based on the phenomenon ofA. Turgor pressureB. Osmotic pressureC. Matric potentialD. Plasmolysis |
| Answer» Correct Answer - C | |
| 871. |
Mass flow is the movement of substance in bulk as a result of pressure differences between two regions ? It is seen forA. WaterB. FoodC. MineralsD. All of these |
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Answer» Correct Answer - D |
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| 872. |
Swelling of grapes in water confirms toA. exosmosisB. endosmosisC. diffusionD. imbibition |
| Answer» Correct Answer - B | |
| 873. |
Two adjacent cells `A` and `B` are being studied. Cell `A` has `OP` of `10` atm and `TP` of `6` atm. Cell `B` has `OP`of `10`atm and `TP` of `4` atm. Movement of water will occur fromA. cell `A`to cell `B`B. cell `B`to cell `A`C. no movement of waterD. cannot be determined. |
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Answer» Correct Answer - A For cell `A:DPD=OP-TP=10-6=4 atm` For cell `B:DPD=OP-TP=10-4=6atm` As water moves from a cell with lower DPD to cell with higher DPD, therefore water will move from cell `A` to cell `B` |
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| 874. |
The OP and TP of two pairs of cells A-B and X-Y are as under Cell A `" "` Cell B OP= -10 atm `" " ` OP=10 atm TP=4 atm `" "` TP=6 atm Cell X `" " `Cell Y OP = -10 atm `" " ` OP=-8 atm TP=4 atm `" "` TP=4 atm The net movement of water shall be fromA. A to B and X to YB. A to B and Y to XC. B to A and X to YD. B to A and Y to X |
| Answer» Correct Answer - D | |
| 875. |
Process of selective transmission of a liquid through semipermeable membrane is calledA. diffusionB. osmosisC. plasmolysisD. transmission |
| Answer» Correct Answer - B | |
| 876. |
Osmotic pressure is maximum inA. hydrophytesB. halophytesC. xerophytesD. mesophytes |
| Answer» Correct Answer - B | |
| 877. |
A 10% solution of which of the following substances shall have maximum OP ?A. NaClB. SucroseC. GlucoseD. Fructose |
| Answer» Correct Answer - A | |
| 878. |
Smaller, lipid soluble diffuse fater through cell membrane, but the movement of hyfrophilic substances is facilitated by certain transporters which are chemicallyA. proteinsB. carbohydratesC. lipidsD. phospholipids. |
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Answer» Correct Answer - A Particles which are lipid soluble (i.e., lipophilic or hydrophobic) can easily diffuse through the cell membrance as the lipid is major constituent of the membrance. Where as hydrophilic substances (i.e., the substances which are soluble in water, e.g., glucose) do not pass through a biological membrane by simple diffusion. They are, therefore, transported across a cell membrane by facilitated diffusion (i.e., carrier mediated diffusion), which takes place with the help of certain transport proteins. |
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| 879. |
Water moves up against gravity and even for a tree of `20m`height the tip receives water within two hours . The most important physiological phenomenon which is responsible for the upward movement of water is `"______"`A. guttationB. evaporationC. transpirationD. none of these. |
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Answer» Correct Answer - C According to transpiration pull theory due to transpiration the water column inside the plant comes under tension This is called transpiration pull On account of this tension, the water column is pulled up passively from below to top of the plant (almost like a rope).A tension of one atmosphere is sufficient to pull water to a heigher of about `20` meters. |
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| 880. |
Water moves up against gravity and even for a tree of `20m`height the tip receives water within two hours . The most important physiological phenomenon which is responsible for the upward movement of water is `"______"` |
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Answer» Transpiration pull is the physiological phenomenon which is responsible for the upward movement of water in trees of height up to 20m. As the water molecules transpire from stomata, it pulls water molecules up ward to the leaf from the continuous chain of water molecules carried by xylem. This transpiration from leaf creates a pressure gradient between the atmosphere and sub-stomatal cavity and intercellular spaces of leaf. This gradient is transferred to photosynthetic cells and then on to xylem of leaf vein. It results in a force called "transpiration pull" that can lift water upto 130m high, through a xylem column. |
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| 881. |
Absorption of water from soil by seeds increases the `"_______"` thus helping seedings to come out of soil. |
| Answer» Due to imbibition of water by seed materials (starch and protein), pushes the seedlings out of the soil, thus the seed swells and imbibition pressure increases inside the seed, which contributing for germination of seeds. | |
| 882. |
The cocentration of solute in four cells is `0.4m.` They are placed in four separate containers `I,II,III` and `IV` filled with saline water of concentrations `0.1M,0.4M,2M` and `3M`respectively. In container will the cell swell?A. `I`B. `II`C. `III`D. `IV` |
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Answer» Correct Answer - A Concentration fo container-I with respect to the cell is hypotonic therefore, endosmosis occurs and water will move from its higher concentration towards its lower concentration (i.e., from container to cell ), as a result of which cell in container-I will swell. |
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| 883. |
A mutant plant is unable to produce materials or precursors that form Casparians trip. This plant would beA. unable to transport water from roots to the leavesB. unable to transport food from leaves to rootsC. unable to control amount of water and solute it absorbsD. able to exert greater root pressure than the normal plant. |
| Answer» Correct Answer - C | |
| 884. |
The concentration of solute in four cells is 0.5 M. They are placed in four separate containers I, II, III and IV filled with saline water of concentrations 0.1 M, 0.5 M, 1 M and 2 M respectively. In ehich container will a cell well.A. IB. IIC. IIID. IV |
| Answer» Correct Answer - A | |
| 885. |
Which is not true for root pressureA. Positive hydrostatic pressureB. Maximum during the day and minimum during nightC. Magnitude is 1-2 barsD. Develops due to metabolic activity of roots |
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Answer» Correct Answer - B |
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| 886. |
Phenomenonof guttationA. Is regulated by Cohension-TensionB. Is due to active solute accumulation by phloemC. Takes place to release excessive solutesD. More than one option is correct |
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Answer» Correct Answer - C |
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| 887. |
Levitt explanation for stomatal action is due toA. Increase in sugar content of guard cellsB. Variatons in pH valueC. Starch is converted into organic acidsD. Light causes opening and darkness closure |
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Answer» Correct Answer - C |
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| 888. |
According to potassium pump theory of LevittA. Starch is incompetely oxidized to PEP during nightB. Malic acid dissociates into malate ion and protons in the subsidiary cells .C. Movement of `H^(+)` ions from guard cell to subsidiary cell is activeD. Potassium malate decreases the OP of guard celll during day |
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Answer» Correct Answer - C |
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| 889. |
Make correctiions wherver you find mistake in spelling s/words in the following paragarph / sentences A According to levitt (1974) active `k^(+)` ion transport and pH of mesophyll cells together control the opening and closing of stomata B water potential can be zero negativ or positve in pure water at atomospheric pressure has minimum potential it is postivbe in a solution in pure water under some external pressure above atomsopheric the water potential is negativ e C Red light is more effective thne light in opening of stomatal pre |
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Answer» A Accroding to levitt (174)acive `K^(+)` transport and pH of the guard cells together control the opening and closing of stomata B water potential canbe zero negative or positive in pure water at atomospheric pressure has zero potential it is negative in a solution in pure water under some external pressure above atomosphereic the water petential is positive C Blue light is more effectivbe than red light in opning of stomatal pore |
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| 890. |
Following are the differences between apoplast pathway and symplast pathway. A. `(iii) only`B. `(i) and (iii) only`C. `(iii) and (iv) only `D. `(ii) and (iii) only` |
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Answer» Correct Answer - C Apoplast pathway is faster while symplast pathway is slightly slower. Metabolic state of root does not affect apoplast pathway while metabolic state of root directly affects symplast pathway. |
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| 891. |
If a cell is placed in 0.25 M solution of sucrose, it shows incipient plasmolysis. The outer solution is, thereforeA. slightly hypotonicB. hypertonicC. less concentratedD. isotonic |
| Answer» Correct Answer - B | |
| 892. |
The casparian strips of root endodermis is made up ofA. SuberinB. CelluloseC. ChitinD. Keratin |
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Answer» Correct Answer - A |
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| 893. |
Transport proteins of __________ are control points , where a plant adjusts the quantity and types of solutes that reach the xylem.A. HypodermisB. EndodermisC. PithD. Pericycle |
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Answer» Correct Answer - B |
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| 894. |
Transport proteins of __________ are control points , where a plant adjusts the quantity and types of solutes that reach the xylem.A. PericycleB. HypodermisC. EndodermisD. Pith |
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Answer» Correct Answer - C |
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| 895. |
Stomata close when guard cells becomeA. flaccidB. unchangedC. turgidD. plasmoylsed |
| Answer» Correct Answer - A | |
| 896. |
Presence of moisture in the atmosphereA. Increases rate of transpirationB. Decreases rate of transpirationC. Does not affect rate of transpiratonD. Transpiratoin becomes repid |
| Answer» Correct Answer - B | |
| 897. |
Stomata close in resposne toA. Hot dry weatherB. Abscisic acidC. CytokininD. Both A and B. |
| Answer» Correct Answer - D | |
| 898. |
Water potential is maximum in case ofA. Pure waterB. `2%`glucoseC. `10%`glucoseD. `10%` NaCl |
| Answer» Correct Answer - A | |
| 899. |
Which one is not connected with transport across the cell membraneA. OsmosisB. Active transportC. DiffusionD. Surface tension |
| Answer» Correct Answer - D | |
| 900. |
The plant cell cytoplasm is surrounded by both cell wall and cell membrane. The specificty of transport of transport of substances is mostly across the cell membrane, becauseA. cell membrane is impermeableB. cell membrane is selectively permeableC. cell membrane is fully permeableD. cell wall is impermeable |
| Answer» Correct Answer - B | |