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.
| 301. |
AntitranspirantsA. reduce the rate of transpiration without affecting carbon assimilationB. reduce the rate of transpiration affecting carbon assimilationC. reduce the rate of transpiration affecting growth of plantD. reduce the rate of transpiration affecting protein synthesis of plant. |
| Answer» Correct Answer - A | |
| 302. |
The stomata open and close due toA. their genetical constitutionB. the force of their habitC. the pressure of gases inside the leafD. a change in the turgor pressure of the guard cells |
| Answer» Correct Answer - D | |
| 303. |
Transpiration facilitatesA. Electrolyte balanceB. Absorption of water by rootsC. Opening of stomataD. Excretion of minerals |
|
Answer» Correct Answer - B Transpiration facilitates absorption of water by roots. |
|
| 304. |
Transpiration facilitatesA. Electrolyte balanceB. Opening of stomataC. Absorption of water by rootsD. Excretion of minerals |
|
Answer» Correct Answer - C |
|
| 305. |
Transpiration facilitatesA. Electrolyte balanceB. Absorption of water by rootsC. Opening of stomataD. Excration of minerals |
| Answer» Correct Answer - B | |
| 306. |
Stomata open when guard cells swell due toA. Decreased water potentialB. Increased water potentialC. Endosmosis by efflux of `K^(+)` ionsD. Endosomosis by influx of hydrogen ions |
|
Answer» Correct Answer - A Stomatal open when guard cells swell due to decreased water potential. |
|
| 307. |
Terporary wilting is due toA. PhotosynthesisB. TranspirationC. RespirationD. Absortion of water |
| Answer» Correct Answer - B | |
| 308. |
Stomata open during day time because the guard cellsA. are thin-walledB. are bean-shapedC. have to help in gaseous exchangeD. photosynthesise and produce sugar or organic acids |
| Answer» Correct Answer - D | |
| 309. |
Stomata open when guard cells swell due toA. Decreased warter potentialB. Increased water potentialC. Endosmosis by effux of K^(+)ionsD. Endosmosis by influx of hydrogen ions. |
| Answer» Correct Answer - A | |
| 310. |
Stomata generally open during the day because the guard cells haveA. Outer thin wallB. ChlorophyllC. Kidney-shapeD. Larger nuclei |
| Answer» Correct Answer - B | |
| 311. |
Stomata open when the guard cells possessA. Less `K^(+)`B. More ABAC. More `K^(+)`D. All the above |
| Answer» Correct Answer - C | |
| 312. |
For keeping stomata open, besides K ions the gurad cells require a constant supply ofA. ABAB. ATPC. Organic acidsD. Protons |
| Answer» Correct Answer - B | |
| 313. |
When a fresh-water protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole willA. disappearB. increase in sizeC. decrease in sizeD. increase in number |
| Answer» Correct Answer - a | |
| 314. |
What happnes to pant cell when it is placed in a hypotonic solution? |
| Answer» Endosmosis occur s resulting turgidity | |
| 315. |
In nature, the orchid seeds germinate only in association withA. MyxomycetesB. Blue green algaeC. ActiononmycetesD. Mycorrhiza |
|
Answer» Correct Answer - D In nature, the orchid seeds germinate only in associntion with mycorrhiza. |
|
| 316. |
Plant seeds when sown in soil , germinate and come out of it , due toA. Turgour pressureB. Imbibition pressureC. Osmotic pressureD. Atmospheric pressure |
|
Answer» Correct Answer - B |
|
| 317. |
Turgour pressure is theA. Positive pressureB. Negative pressureC. Atmospheric pressureD. Imbibition pressure |
|
Answer» Correct Answer - A |
|
| 318. |
Water potential gradient between absorbent and the liquid imbibed is essential for imbibition . In addition, for any substance to imbibition . In addition, for any substance to imbibe any liquid, one of the following is also a pre-requisiteA. Affinity beteen adsorbant and the liquidB. Molecular density of adsorbantC. Concentration of adsorbantD. Pressure potential of the absorbant |
| Answer» Correct Answer - B | |
| 319. |
The pressure flow of mass flow hypothesis of pholem translocation explains thatA. Sugars are loaded actively in sieve tubesB. Incoming sugars are actively transported out of the phloem and removed as complex carbohydratesC. Loss of solute produce as low `Psi_(W)` in the pholemD. More than one option is correct |
|
Answer» Correct Answer - D |
|
| 320. |
Select the correct events leading to the opening of the stomata (i) Decline in guard cell solutes (ii) Lowering of osmotic potential of guard cells (iii) Rise in potassium levels in guard cells (iv) Movement of water from neighbouring cells into guard cells (v) Guard cells becoming flaccidA. a,eB. b,c,dC. a,c,dD. b,d,e |
| Answer» Correct Answer - B | |
| 321. |
In majority of plant, the guard cells areA. Dumb-bell shapedB. RenifornC. RoundedD. Polygonal |
| Answer» Correct Answer - B | |
| 322. |
Which of the following hypostomatous leaves would dry up lastA. Both surfaces greasedB. Both surfaces ungrasedC. Lower surfaces greasedD. Upper surfaces greased |
| Answer» Correct Answer - A | |
| 323. |
The maximum absorption of water by roots occurs in the (region) zone ofA. Root capB. Cell divisionC. Cell elongationD. Root hairs |
| Answer» Correct Answer - C | |
| 324. |
Optimim temperature for water absorption isA. `0^(@)-5^(@)C`B. `5^(@)-20^(@)C`C. `20^(@)-25^(@)C`D. `40^(@)-50^(@)C` |
| Answer» Correct Answer - C | |
| 325. |
At 0^(@)C soil temperature the rate of water absorptionA. IncreasesB. Non affectedC. DecreasesD. Appreciable |
| Answer» Correct Answer - C | |
| 326. |
Which of the following pathway is particularly through cell wall ?A. Apoplast pathwayB. Vacuolar pathwayC. Symplast pathwayD. Both (a) and (c ) |
| Answer» Correct Answer - A | |
| 327. |
Most of the absorption of water from soil occurs throughA. rootsB. leavesC. xylemD. endodermis |
| Answer» Correct Answer - A | |
| 328. |
Rate of water absorption is slow near freezing point becauseA. Water absorption is a metabolic processB. Cell growth stopsC. Transpiration is reducedD. Cell membrances become more viscous. |
| Answer» Correct Answer - D | |
| 329. |
Which of the following may be used as an anti-transpirant in plantA. Phenyl mercuric acetateB. Cobalt chlorideC. MercuryD. Potassium |
|
Answer» Correct Answer - A |
|
| 330. |
Prolonged water-logging kills plant due toA. Stoppage of root respirationB. Dilution of soil nutrientsC. Dilution of plant cell sapD. Leaching of nutrients . |
| Answer» Correct Answer - A | |
| 331. |
Mark the mismatched pair.A. Amyloplast - Store protein granuleB. Elaioplast - Store oils or fatsC. Chlorplasts - Contain chlorophyll pigmentsD. Chromoplasts - Contain coloured pigments other than chlorophyll |
|
Answer» Correct Answer - A Amylopasts are non pigmented organells found in some plant cells. They are responsible for synthesis and storage of starch granules, through polymeristation of glucose. |
|
| 332. |
Atmospheric pressure is measured byA. PsychrometerB. TensiometerC. ManometerD. Osmometer |
| Answer» Correct Answer - A | |
| 333. |
Stomatal opening is influenced byA. `N_(2)` concentration, `CO_(2)` concentration and lightB. `CO_(2)` concentration, temperature and lightC. `N_(2)` concentration, light and temperatureD. `CO_(2)` concentration, `N_(2)` concentration and temperature |
|
Answer» Correct Answer - B Stomatal opening is influenced by `CO_(2)` concentration, temperature and light. |
|
| 334. |
Match the following and choose the corrct option. A. Leaves (i)Anti-transpirant B. Seed (i) transpirant C. Roots (iii) Negative osmotic potential D Aspirin (iv) Imbibition E Plasmolysed cell (v) AbsorptionA. `A-(ii),B-(iv),C-(v),D-(i),E-(iii)`B. `A-(iii),B-(ii),C-(iv),D-(i),E-(v)`C. `A-(i),B-(ii),C-(iii),D-(iv),E-(v)`D. `A-(v),B-(iv),C-(iii),D-(ii),E-(i)` |
| Answer» Correct Answer - A | |
| 335. |
Guttation is found mostly inA. Herbaceous plantB. ShrubsC. Wood plantsD. None of these |
|
Answer» Correct Answer - A |
|
| 336. |
Halophytest may show precell pressure very much higherthan atmospheric pressure. Explain how this can happen ? |
| Answer» The halophytes have salt secreting glands in their epidermal tissue. The help in removal of excess salts from their internal tissue to maintain their osmolarity and the atmospheric pressure on them. | |
| 337. |
Prolonged water-logging kills plants due toA. Stoppage of root respirationB. Dilution of soil nutrientsC. Dilution of plant cell sapD. Leaching of nutrients |
|
Answer» Correct Answer - A Prolonged water-logging kills plants due to stoppage of root respiration. |
|
| 338. |
When osmotic potential is either zero or negative and pressure potential is positive, then the water potential will beA. NegativeB. PositiveC. Sometimes negative and sometimes positiveD. None of the above |
|
Answer» Correct Answer - A |
|
| 339. |
Which of the following is not a purpose of transpirationA. Prevents loss of waterB. Helps in absorption and transportC. Makes cells rigidD. Cools leaf surfaces |
|
Answer» Correct Answer - A A |
|
| 340. |
Which of the following is not a purpose of transpirationA. Helps in absorption and transport in plantsB. Prevents loss of waterC. Maintains shape and structure of plants by keeping the cell turgidD. Supplies water for photosynthesis |
|
Answer» Correct Answer - B |
|
| 341. |
Which of the following is not a purpose of transpirationA. Supplies water for photosynthesisB. Helps in translocation of sugars from source to sinkC. Maintains shape and structure of the plantsD. Cools leaf surfaces |
|
Answer» Correct Answer - B |
|
| 342. |
Hydathodes occur onA. StemB. LeavesC. RootsD. All the above |
| Answer» Correct Answer - B | |
| 343. |
Read the following statements and find out the incorrect statement.A. In liquid and gaseous form water molecules are in random motion that is both rapid and constant.B. The greater the concectration of water in a system, the greater is its kinetic energy or water potential.C. Net movement of water molecules occurs from the system with higher energy to the one with lower energy.D. Water will move from the sytem containing water at lower water potential to the one having higher water potential. |
|
Answer» Correct Answer - D Water will move from system containing water at hiegh water potential to the one having lower water potential |
|
| 344. |
Potometer works on the principle ofA. Osmotic pressureB. Amount of water absorbed equals the amount transpireC. Root pressureD. Potential difference between the tip of the tube and that of the plant |
|
Answer» Correct Answer - B |
|
| 345. |
Actual pathway of ascent of sap is throughA. cambiumB. phloemC. xylemD. epidermis |
| Answer» Correct Answer - C | |
| 346. |
In the terrestrial habitat which of the following factors affect temperature and rainfall conditionsA. TranslocationB. TranspirationC. TransformationD. Thermodenaturation |
|
Answer» Correct Answer - B Transpiration increases with increase in temperature nd decreases with rainfall conditions. Transpiration will also depends on number stomate as more stomata may provide more pores for transpiration. |
|
| 347. |
Water is lost in a liquid state in some plants through hydathodes. These hydathodesA. Remain closed at nightB. Remain closed during dayC. Remain always openD. Do not show any specificity in opening and closing |
|
Answer» Correct Answer - C |
|
| 348. |
Water is lost through hydathodes. HydathodesA. Remain closed at nightB. Remain closed during dayC. Remain always openD. Remain open during day . |
| Answer» Correct Answer - C | |
| 349. |
Water is lost through hydathodes. HydathodesA. Remain closed at nightB. Remain closed during dayC. Remain always openD. Remain open during day |
|
Answer» Correct Answer - C Water is lost through hydathodes. Hydathodes remain always open. |
|
| 350. |
In which of the following type of stomata accessory cells are found to be absent ?A. AnomocyticB. AnisocyticC. ParacyticD. Diacytic |
| Answer» Correct Answer - A | |