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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.
| 151. |
Transpiration and root pressure cause water to rise in plants byA. Pushing it upwardB. Pushing and pulling it, respectivelyC. Pulling it upwardD. Pulling and pushing it, respectively |
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Answer» Correct Answer - D Transpiration and root pressure cause water to ries in plants by pulling and pushing it, reapectively. |
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| 152. |
Transpiration and root pressure cause water to rise in plants byA. pulling and pushing it respectivelyB. pushing it upwardC. pushing and pulling it, respectivelyD. pulling it upward |
| Answer» Correct Answer - A | |
| 153. |
Rate of transpiration higher than rate of water absorption shall causeA. GrowthB. Leaf fallC. WilingD. Death |
| Answer» Correct Answer - C | |
| 154. |
Transpiration and root pressure cause water to rise in plants byA. Pushing and pulling it , respectivelyB. Pulling it upwardC. Pulling and pushing it , respectivelyD. Pushing it upward |
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Answer» Correct Answer - C |
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| 155. |
Which one of the following will reduce the rate of transpiratonA. Increase in wind velocityB. Rise in tempertureC. Increase in water uptake by plantsD. Decrease in light intensity |
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Answer» Correct Answer - D |
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| 156. |
Rate of transpiration higher than rate of water absorption shall causeA. GrowthB. Leaf fallC. WiltingD. Death |
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Answer» Correct Answer - C Rate transpriation higher than rate of water absorption shall cause wilting. |
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| 157. |
Transpiration increase with increase inA. HumidityB. TemperatureC. MineralsD. Soil moisture |
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Answer» Correct Answer - B |
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| 158. |
Rate of transpiration will increase ifA. RH increasesB. RH decreasesC. RH remains unchangedD. Water potential gradiant remains unchanged |
| Answer» Correct Answer - B | |
| 159. |
The rate of transpiration of a plant would gradually increase ifA. the releative numidity increasesB. the relative humidity decreasesC. the relative humidity remain unchangedD. the water potential gradient remain unchanged |
| Answer» Correct Answer - b | |
| 160. |
Rate of transpiration is I. increased with increase in temperature. II. Stopped in dark, due to elosure of stomata. III. Decreased, when relative humidity is high. IV. Decreased with wind velocity.A. I, II and IIIB. I and IIC. Only IID. Only IV |
| Answer» Correct Answer - A | |
| 161. |
Increase in temperature and velocity of wind cause an increase in transpiration initially but later it slows down, becauseA. Of closure of stomataB. Water is not made availableC. The air around the plant becomes humidD. Of mechanical disturbance |
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Answer» Correct Answer - A |
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| 162. |
Transpiration increase with increase inA. temperatureB. pressure gradientC. turgor pressure and lightD. diffusion pressure deficit |
| Answer» Correct Answer - A | |
| 163. |
Guttation takes place by means ofA. guard cellsB. hydathodesC. stomataD. lenticells |
| Answer» Correct Answer - B | |
| 164. |
The transport of surgars and other organic molecules within a plant is calledA. transpiration pullB. guttationC. transiocationD. assimilation |
| Answer» Correct Answer - C | |
| 165. |
The term water potential was coined byA. Sayre and DixonB. Llyod and BoseC. von MohlD. Slayter and Taylor |
| Answer» Correct Answer - D | |
| 166. |
The term water potential was coined byA. SayreB. Von MohlC. LloydD. Slatyer and Taylor |
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Answer» Correct Answer - D The term water potential was coined by Slatyer and Taylor. |
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| 167. |
The term root pressure was coined byA. Priestlye (1729)B. Stephen Hales (1727)C. Sachs (1809)D. JC Bose (1923) |
| Answer» Correct Answer - A | |
| 168. |
Bacteria cannot survive in a highly salted pickle becauseA. Salt inhibits reprodution of bacteriaB. They become plasmolysed and dieC. Nuterients in it cannot support lifeD. Enough light is not available for photosynthesis. |
| Answer» Correct Answer - B | |
| 169. |
Munch hypothesis is based onA. translocatio of food due to tp gradient and imbibitin forceB. trnslocation of food due to trugor pressure tp gradientC. transclocation of food due to imbibition forceD. none of the above |
| Answer» Correct Answer - b | |
| 170. |
Briefly describe water potential. What are the factors affecting it? |
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Answer» Water potential quantifies the tendency of water to move from one part to the other during various cellular processes such as diffusion, osmosis, etc. It is denoted by the Greek letter Psi or `psi and is expressed in Pascals (Pa). The water potential of pure water is always taken as zero at standard temperature and pressure. Water potential `(psi w)` is expressed as the sum of solute potential `(psi s)` and pressure potential `(psi p)`. ` psi w = psi s + psip ` When some solute is dissolved in water, the water potential of pure water decreases. This is termed as solute potential `(psi s)`, which is always negative. For a solution at atmospheric pressure,` psi w = psi s . ` The water potential of pure water or a solution increases on the application of pressure values more than atmospheric pressure. It is termed as pressure potential. It is denoted by Ψp and has a positive value, although a negative pressure potential is present in the xylem. This pressure potential plays a major role in the ascent of water through the stem. |
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| 171. |
The mapping of the pahtway of carbon assimilation in photosythesis earned Noble Prize in 1961 toA. J.A BasshamB. Melvin CalvinC. Hatch and SlackD. T.W. Engelmann |
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Answer» Correct Answer - B The mapping of the pathway of carbon assimilation in photosynthesis earned Noble Prize in 1961 to Melvin Calvin. |
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| 172. |
Epidermal cells containing chloraplasts areA. HydathodeB. StomataC. Guard cellD. Epithem |
| Answer» Correct Answer - C | |
| 173. |
Each stoma is surrounded byA. passage cellsB. Guard cellsC. Parenchyma cellsD. Lenticels |
| Answer» Correct Answer - B | |
| 174. |
Guttation is due toA. Negation root pressureB. Positive roots pressureC. TranspirationD. None of the above |
| Answer» Correct Answer - B | |
| 175. |
Which one keeps its stomata open during and closedA. CactusB. water LilyC. IvyD. Hibiscus |
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Answer» Correct Answer - A Cactus keeps its stomata of plant open during night and close during the day. |
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| 176. |
When stomata remain open throughout the day and night, they are calledA. alfa-alfa typeB. potato typeC. barley typeD. Equisetum type |
| Answer» Correct Answer - A | |
| 177. |
Epidermal cells containing chloraplasts areA. HydathodesB. Accessory cellsC. StomataD. Guard cells |
| Answer» Correct Answer - D | |
| 178. |
Which one keeps its stomata open during night and closed during dayA. CactusB. Water LilyC. IvyD. Hibisus |
| Answer» Correct Answer - A | |
| 179. |
Epidermal is associated withA. RespirationB. GuttationC. TranspirationD. Photosynthesis |
| Answer» Correct Answer - B | |
| 180. |
Stomata open during day due toA. Accumulation of K^(+) ion and sugerB. High pHC. Osmotic effect of ions present in guard cellsD. None of the above |
| Answer» Correct Answer - A | |
| 181. |
The stomata are widely open inA. red lightB. blue lightC. green lightD. yellow light |
| Answer» Correct Answer - B | |
| 182. |
Path of greater resistance in transpiration isA. stomatalB. cuticularC. pectinD. all equally |
| Answer» Correct Answer - B | |
| 183. |
A cell becomes turgid, when placed inA. isotonic solutionB. hypertonic solutionC. hypotonic solutionD. None of these |
| Answer» Correct Answer - C | |
| 184. |
Some plants possess modifications like phyllodes, scale leaves, etc. forA. Differentiation and evolutionB. Decreasing transpirationC. Increasing transpirationD. Storage of absorbed water |
| Answer» Correct Answer - B | |
| 185. |
Due to plasmolysis, the plant cellA. BurstsB. Swells upC. Becomes turgidD. Becomes flaccid |
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Answer» Correct Answer - D |
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| 186. |
In plasmolysis, a plant cellA. Swells upB. BurstsC. Becomes flaccidD. Becomes turgid |
| Answer» Correct Answer - C | |
| 187. |
Passage of water through a semipermeable membrane causesA. Suction pressureB. Osmotic pressureC. Turgor pressureD. Wall Pressure |
| Answer» Correct Answer - A | |
| 188. |
Movement of water from higher water potential to lower water potential through a semipermeable membrane is calledA. OsmosisB. DiffusionC. PlasmoluysisD. Imbibition |
| Answer» Correct Answer - A | |
| 189. |
In the given diagram, which is the initial condition of plasmolysis A. PB. QC. RD. S |
| Answer» Correct Answer - A | |
| 190. |
Gradient of pressure has been regarded as a possible mechanism for food translocation byA. MunchB. CuritsC. Mason and MaskellD. Dixon |
| Answer» Correct Answer - A | |
| 191. |
Who has used two bulbs of semipermeable membrane to explain pressure flow theory Gradient pressure was given as a possible mechanism of translocation of food byA. MunchB. JonesC. SpannerD. Fenson |
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Answer» Correct Answer - A |
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| 192. |
Refer to the given figure and select the correct option regarding this. A. Water will diffuse across the membrane to raise the level of solution in the funnel.B. Pressure can be applied to raise the water movement into the funnel.C. Sucrose solution is an osmoticallu active solution which cannot absorb water.D. all of these. |
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Answer» Correct Answer - A The given figure is a demonstration of osmosis in which thistle funnel is filled with sucrose solution and kept inverted in a beaker containing water will diffuse across the membrane to raise the level of the solution in the funnel. Pressure can applied to stop the water movement into the funne. Sucrose solution is an osmotically active solution and can absorb water. |
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| 193. |
Read the given statements that refer to different stages of plasmolysis. Select the correct option regarding them. `(i)` First stage of plasmolysis, when osmotic concentration of cell sap is just equivalent to that of external solution. `(ii)` Protoplast withdraws itself from corners of hte cell wall Protoplast gets detached from the cell wall and attains a spherical shape.A. `{:("(I)","(II)","(III)"),({:("Incipient"),("plasmolysis"):},{:("Limiting"),("Plasmolysis"):},{:("Evident"),("Plasolysis"):}):}`B. `{:("(I)","(II)","(III)"),({:("Limiting"),("plasmolysis"):},{:("Incipient"),("plasmolysis"):},{:("plasmolysis"),("Evident"):}):}`C. `{:("(I)","(II)","(III)"),({:("Limiting"),("plasmolysis"):},{:("Evident"),("Plasmolysis"):},{:("Incipient"),("Plasolysis"):}):}`D. `{:("(I)","(II)","(III)"),({:("Evident"),("plasmolysis"):},{:("Incipient"),("Plasmolysis"):},{:("Limiting"),("Plasolysis"):}):}` |
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Answer» Correct Answer - B Shrinkage of the protoplast of a cell from its cell wall under the influence of a hypertonic solution is called plasmolysis. Hypertonic solution causes exomosis or wihtdrawal of water from cytoplasm and then the central vacuole of cell. The size of cytoplasm as well as central vacuole and hence protoplast becomes reduced. The pressure on the wall is simultaneously reduced and the elastic wall contracts causing a reduction in cell size .This is first stage of plasmolysis called limiting plasmolysis.At limiting plasmolysis the pressure potential `(Psi_(rho))` is zero and the osmotic concentration of cell interior is just equivalent to that of external solution (isotonic). The cell is called flaccid. The extra hypertonic external solution continues ot withdraw water from the central vacuole by exosmosis Initially the protoplast withdraws itself from the corners, This stage is known as incipient plasmolysis ,Due to continued exosmosis protoplast shrinks further and wihtdraws from the cell wall except one or a few points. It is known as evident plasmolysis. |
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| 194. |
Why all minerals are not passively absorbed by roots ? Give any one reason. |
| Answer» Minerals are present as charged particles in soil. | |
| 195. |
Long distance transport of substances within a plant can not be done byb diffusion alone. Diffusition is a slow processs. The movement of am molecule across a typical plant cell about `50mum` takes approximatelyA. 2.5 minutesB. 2.5 hoursC. 2.5 secondD. 5.0 minutes |
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Answer» Correct Answer - C Long distance transport of substances within a plant cannot be done by diffusion alone. Diffusion is a slow process. The movement of a molecule across a typical plant cell about 50` mum` takes approximately 2.5 seconds |
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| 196. |
Refer to the given figure representing mechanism of translocation and select the option which correctly identifies `A.B` and `C` A. A- phloem ,B- Sugars enter tube , C-`Sugars leave sieve tubeB. A- Xylem , B - Sugars enter tube , C - Sugars leave sieve tubeC. A- Xylem , B- Sugars leave sieve tube , C - Sugars enter sieve tubeD. A- Phloem , B - Sugars leavs sieve tube , C - Sugars enter phloem, It can be demonstrated by |
| Answer» Correct Answer - A | |
| 197. |
Refer to the given table and select the option that correctly fills the blanks in it. A. `{:(A,B,C,D),(No,Yes,No,No):}`B. `{:(A,B,C,D),(Yes,Yes,Yes,No):}`C. `{:(A,B,C,D),(No,No,No,Yes):}`D. `{:(A,B,C,D),(No,Yes,Yes,Yes):}` |
| Answer» Correct Answer - A | |
| 198. |
Refer to the given figure Select the correct statement regarding the labelled parts `A-C`A. The inner wall of `B` towards `C` is thick and elastic.B. The opening and closing of the stomata is due to change in the turgidity of `B`C. The opening of the stoma is aided due to the orientation of `A` in the cell walls of `B`.D. all of these. |
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Answer» Correct Answer - D In the given figure labelled part `A,B` and `C` represent microfibrils, guard cell and stomata aperture respectively. |
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| 199. |
Refer to the given figure and select the option which correctly identifies `A,B` and `C` A. `{:(,A,B,C),(,"Xylem","Phloem","Stomatal pore"):}`B. `{:(,A,B,C),(,"Pnloem","Xylem","Stomatal pore"):}`C. `{:(,A,B,C),(,"Pnloem","Xylem","Guard cell"):}`D. `{:(,A,B,C),(,"Xylem","Pnloem","Guard cell"):}` |
| Answer» Correct Answer - D | |
| 200. |
Refer to the given figure Identify the lavbelled parts `(A-H)` and select the correct option. A. A-Symplastic path,B-Apoplastic path,C-Cortex, D-Endodermis,E-Casparian strips,F-Pericycle, G-Xylem,H-PhloemB. A-Apoplastic path ,B-Symplastic path,C-Cortex, D-Endoermis,E-Casparian strips,F-Pericycle, G-Xylem,H-PhloemC. A-Apoplastic path,B-Symplastic path ,C-Cortex, D-Endodermis,E-Casparian strips,F- Pericycle, G-Phloem,H-XylemD. A-Symplastic path ,B-Apoplastic path ,C-Cortex,G-Phloem,H-Xylem D-Endodermis ,E-Casparian strips ,F-Pericycle, G-Phloem,H-Xylem |
| Answer» Correct Answer - B | |