InterviewSolution
Saved Bookmarks
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.
| 751. |
Water in plants is transported by or diffusion of sap takes place throughA. CambiumB. ImbibitionC. XylemD. Active absorption |
|
Answer» Correct Answer - C Water is plants is transported by or ascent of sap takes place through xylem |
|
| 752. |
In downward translocation, food is transportedA. from below to upwardB. from roots to stemC. from leaves to rootsD. phloem never conducts food |
| Answer» Correct Answer - C | |
| 753. |
Passage cells are thin walled cells found inA. Endodermis of roots facilitating rapid transport of water form cortex to pericycleB. Phloem elements that serve as entry points for substances for transport to other plant partsC. Testa of seeds to enable emergence of growing embryonic axis during seed germinationD. Central region of style through which the pollen tube grows towards the ovary |
|
Answer» Correct Answer - A |
|
| 754. |
Leaf photosynthats are transported to other parts of higher plants through or food is transported to various parts of the plant throughA. Cambial cellsB. Pith cellsC. Xylem cellsD. Phloem cells |
|
Answer» Correct Answer - d |
|
| 755. |
Name the plant process carried by hydathodes |
| Answer» Correct Answer - Guttation | |
| 756. |
When the cell is turgidA. `Psi_(P) gt Psi_(S)`B. `Psi_(P) lt Psi_(S)`C. `Psi_(P) = Psi_(S)`D. `Psi_(P) ne Psi_(S)` |
| Answer» Correct Answer - C | |
| 757. |
Whter potential of a solution is alwaysA. less than zeroB. zeroC. more than zeroD. unity |
| Answer» Correct Answer - A | |
| 758. |
The cell `A` has an osmotic potential of `-20` bars and a pressure potential of `+6` bars. What will be its water potential?A. `-14bars`B. `+14bars`C. `-20bars`D. `-26bar` |
|
Answer» Correct Answer - A `Psi_(w)=Psi_(s)+Psi_(rho)` Where `Psi_(w)=`water potential ,`Psi_(s)=` osmotic potential and `Psi_(rho)=` pressure potential `Psi_(w)=(-20)+(+6)=-14` "bars"` |
|
| 759. |
A cell has osmotic pressure of 10 bars and its turgor pressure is 6 bars find its DPD |
| Answer» The DPD is 4 bars (i.e 10-6=4) | |
| 760. |
The cell `A` has an osmotic potential of `-20` bars and a pressure potential of `+6` bars. What will be its water potential?A. `-14` barsB. `+14` barsC. `-20` barsD. `+20` bars |
| Answer» Correct Answer - A | |
| 761. |
If a cell loses water its D.P.D.A. decreasesB. increasesC. remains sameD. either (1) and (2) |
| Answer» Correct Answer - B | |
| 762. |
How osomotic pitential is realted with osmotic pressure ? What is the unit of osmotic quantites ? |
| Answer» The osmotic potential is numerically eual to the osmotic pressure but is negative in sign the unit of osomtic quantites is a bar (a unit of the metirc system : 1 atm =1.01 bars) | |
| 763. |
The principles of photosynnthesis as established by ............. Are, at present, being used in studies in solar energy researchA. J.A. BasshamB. Melvin CalvinC. Hatch and SlackD. T.W. Engelmann |
|
Answer» Correct Answer - B The principles of photosynthesis as established by Melvin Calvin are, at present, being used in studies in solar energy research. |
|
| 764. |
Entry of water into a cell causes swelling of protoplast due toA. DPDB. Osmotic pressureC. ImbibitionD. Turgor pressure . |
| Answer» Correct Answer - D | |
| 765. |
The Pressure exerted by the swelling protoplast on the walls of the cell isA. Wall pressureB. Osmotic pressureC. Suction pressureD. Turgor pressure . |
| Answer» Correct Answer - D | |
| 766. |
In mass flow , various substance move independently according to theirA. SizeB. Concentration gradientC. Root pressureD. Carrier proteins |
|
Answer» Correct Answer - B |
|
| 767. |
The osmotic theory of active water absorption was first gives byA. Kramer (1941)B. Eaton (1943)C. Atkins(1916)D. Priestley (1923) |
| Answer» Correct Answer - D | |
| 768. |
plant imbibants areA. hydrophobic colloidsB. hydrophilic colloidsC. chitin and suberinD. lignin like compounds |
| Answer» Correct Answer - B | |
| 769. |
Assertion : The adsorption of water by the solid particles of an adsorbant without forming a solution is known as imbibition. Reason : The liquid, which is imbibed is known as imbibate.A. Both the Assertion and Reason are true and Reason is the correct explanation of the Assertion.B. Both Assertion and Reason are true, but Reason is not the correct explanation of assertionC. Assertion is true, but Reason is falseD. Assertion is false, but Reason is true |
|
Answer» Correct Answer - B In imbibition, the absorption of water by solid particles of an absorbant without forming a solution takes place. Imbibants are solid substances, which take part in absorption, while the liquid, which is absorbed (imbibed) is known as imbibate. |
|
| 770. |
The `psi_(W)` of imbibants isA. highly negativeB. highly positiveC. zeroD. always positive |
| Answer» Correct Answer - A | |
| 771. |
Maximum and minimum imbibing capacity is found inA. Agar ` gt` Protien `gt ` Starch `gt` CelluloseB. Agar ` gt ` Cellulose `gt ` Protein `gt` Starch `gt` Pectin `gt` FatC. Cellulose `gt` Agar `gt ` Starch `gt` Pectin `gt` Fat `gt ` ProteinD. Cellulose `gt` Protein` gt ` Pectin `gt` Fat `gt` Starch `gt` Agar . |
| Answer» Correct Answer - A | |
| 772. |
Assertion : Imbibition capacity is maximum in phycocolloids, proteins, starch and cellulose. Reason : Lignin show imbibition of water.A. Both the Assertion and Reason are true and Reason is the correct explanation of the Assertion.B. Both Assertion and Reason are true, but Reason is not the correct explanation of assertionC. Assertion is true, but Reason is falseD. Assertion is false, but Reason is true |
|
Answer» Correct Answer - C Proteins, starch and cellulose show imbibition, because they are hydrophilic in nature, whereas lignin does not show imbibition, because of its hydrophobic nature. |
|
| 773. |
A : Xerophytes have high water retaining capacity . R: They have high OP .A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)C. Assertion is true statement but Reason is false, then mark (3)D. If both Assertion and Reason are false statements , then mark (4) |
|
Answer» Correct Answer - A |
|
| 774. |
Which helps in maintaining form and structure of cellsA. Wall pressureB. TurgidityC. Atmospheric pressureD. D.P.D |
| Answer» Correct Answer - B | |
| 775. |
Cold soils are considered to beA. physically dryB. heavy soilsC. physiologically dryD. acidic soils |
| Answer» Correct Answer - C | |
| 776. |
Land plants grow in soils which possess an osmotic concentrationA. Hypotonic in relation to cellsB. Hypertonic in relation to cellsC. Isotonic in relation to cellsD. ultratonic in relation to cells . |
| Answer» Correct Answer - A | |
| 777. |
Which of the following statement is correct ?A. Members of gymnosperms show high root pressureB. Actively transpiring plants show high root pressureC. Root pressure is mainly responsible for ascent of sap in very tall treesD. None of the above |
|
Answer» Correct Answer - D The root pressure do not account for water movement up the xylem in tall trees, actively transpiring plants and conifers. |
|
| 778. |
Water molecules possess kinetic energy only. |
| Answer» Correct Answer - False | |
| 779. |
If some solute is dissolved in pure water , the water potential decreases . |
| Answer» Correct Answer - True | |
| 780. |
Water potential of a cell is affected by solute potential only . |
| Answer» Correct Answer - False | |
| 781. |
In the given flow chart the flow of water is shown from soil to xylem of the root. Identify the tissues involved in steps `A` nad `B` A. A -Hypodermis , B - protoxylemB. A - Medullary rays ,B - PhloemC. A - Endodermis , B - PhloemD. A - "Endodermis", B -"Protoxylem" |
| Answer» Correct Answer - D | |
| 782. |
In the given flow chart, the flow of water is shown from soil to xylem. Mention the step A and B. A. A-hypodermis B-ProtoxylemB. A-Pith B-PlasmodesmataC. A-Endodermis B-ProtoxylemD. A-Endodermis B-Protoxylem |
| Answer» Correct Answer - C | |
| 783. |
The following figure shows the stomatal appartatus. Identify the parts labelled aas a, b, c, d. Choose the correct answer from the following : A. a - subsidiary cells, b - chloro - plaste, c - stoma, d - guard cellB. a - guard cells , b - Stoma, c - Chloroplasts , d - subsidiary cellsC. a - guard cells, b - c - stomachloro - Chloroplasts , c - stoma, d - subsidiary cellD. a - subsidiary cells, b - Stoma , c - Chloroplasts d - guard cell |
| Answer» Correct Answer - C | |
| 784. |
Which ones do not show transpiration ?A. Aquatic plants with floating leavesB. Aquatic submerged plantsC. Plants growing in hilly areasD. Plants living in deserts |
| Answer» Correct Answer - C | |
| 785. |
If two solutions have the same osmolarity, they are said to beA. IsotonicB. HypertonicC. HypotonicD. None of the above |
| Answer» Correct Answer - A | |
| 786. |
In osmosis, there is movement ofA. solute onlyB. solvent onlyC. Both (a) and (b)D. None of these |
| Answer» Correct Answer - B | |
| 787. |
First theory for the ascent of sap was proposed byA. JC BoseB. GodlewskiC. WestermaierD. Krammer |
| Answer» Correct Answer - B | |
| 788. |
Sir J.C. Bose proposed in theory of ascent of sap known asA. Pulsation theoryB. Transpiration pull theoryC. Relay pump theoryD. Capillary force theory |
|
Answer» Correct Answer - A Sir J.C Bose proposed on theory of ascent of sap known as pulsation theory |
|
| 789. |
Read the following statements and find out the incorrect statement.A. More the solute concentration in funnel, greater will be the pressure reqiured to prevent water form diffusuing in it.B. Numerically osmotic pressure is eqiuvalent to osmotic potential, but the sign is opposite.C. Osmotic pressure is negative pressure while osmotic potential is positive.D. In plant cells, the cell membrane and tonoplast together are important determinants of movements of molecules in or out of the cell. |
|
Answer» Correct Answer - C More the solute concentration in funnl, greater will be the pressure required to water from diffusing in it Numerically osmotic pressure is equivalent to osmotic potential , butn the sign is opposite. Osmotic pressure is positive while osmotic potential is negative Im plnat cells, the cell membrane and tonoplast together are importnat determinants of movements of molecules in our out of the cell. |
|
| 790. |
If choesion-tension transpiration pull theroy is correct break in water column shouldA. Increase water content of leavesB. Increase rate of photsynthesisC. Cause wilting of leavesD. Have no effect at all |
|
Answer» Correct Answer - C If cohesion- tension transpiration pull theory is correct break in water column should cause wilting of leaves. |
|
| 791. |
DPD is abbreviated form ofA. Daily photosynthetic deficitB. Daily phosphorus deficitC. Daily pressure deficitD. Diffusion pressure deficit |
|
Answer» Correct Answer - D DPD is abbreviated from to diffusion pressure deficit. |
|
| 792. |
If the external solution balances the osmotic pressure of the cytoplasm it is said to be .... `a` .... If the extrnal solution is more concentrated, it is .... `b` ....`and` if the external solution is more dilute it is .... `c` ....A. b-hypertonic, a-isotonic, c-hypotonicB. c-hypertonic, a-isotonic, b-hypotonicC. a-hypertonic, b-isotonic, c-hypotonicD. b-hypertonic, c-isotonic, a-hypotonic |
|
Answer» Correct Answer - A If the external solution balances the osmotic pressure of the cytoplasm it is said to be isotonic. If the external solution is more concentrated, it is hypertonic and if the external solution is more dilute it is hypotonic |
|
| 793. |
During plasmolysis, water moves out from the cell, it is first lost from theA. Cytoplasm and then from the vacuoleB. Vacuole and then from the cytoplasmC. Cytoplasm and then from the nucleusD. Nucleus and then from the cytoplasm |
|
Answer» Correct Answer - A During plasmolysis, water moves out from the cell, it is first lost from the cytoplasm and then from the vacuole |
|
| 794. |
Swelling of wooden frames during rains is caused byA. EndosmosisB. ImbibitionC. CapillarityD. Osmosis |
|
Answer» Correct Answer - B Swelling of wooden frames during rains is caued by imbibition. |
|
| 795. |
The water potential of a solution is indicated byA. `Psi_(w)`B. `Psi_(s)`C. `Psi_(x)`D. `Delta_(Psi)` |
| Answer» Correct Answer - A | |
| 796. |
In simple osmotic systems, at constant temperatures , the water potential results from the combined but opposite actions ofA. Relative humidity & pressure potentialB. Pressure potential and saturationC. Saturation vapour pressure and osmotic potentialD. Osmotic potential and pressure potential |
| Answer» Correct Answer - D | |
| 797. |
Which of the following molecules is capable of generating the greatest osmotic pressure ?A. 300 mM glucoseB. 300 mM ureaC. 300 `mMNaCl`D. 300 mM `CaCl_(2)` |
| Answer» Correct Answer - D | |
| 798. |
Pressure potential of a plant cell and its turgor pressure areA. Numerically equal but first is in negative and second in positive valueB. Numerically equal and both positiveC. Numerically equal but first is positive and second negativeD. Both are numerically different and are negative |
| Answer» Correct Answer - B | |
| 799. |
Turgor pressure of a plant cell increases due toA. EndosmosisB. ExosmosisC. Wall pressureD. Diffusion pressure |
| Answer» Correct Answer - D | |
| 800. |
For conducting girdling experimentsA. the cortex is removedB. the cortex and primary phloem and removedC. all tissues upto secondary xylem are removedD. none of the above |
| Answer» Correct Answer - C | |