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.
| 1001. |
Wilting in plants occurs whenA. Phloem is blockedB. Xylem is removed/blockedC. Pith is removedD. A few leaves are removed |
| Answer» Correct Answer - B | |
| 1002. |
Wilting occurs whenA. Rate of transpiration is higher than absorptionB. Rate of absorption is higher than transpirationC. Excess root pressureD. High relative humidity in air |
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Answer» Correct Answer - A |
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| 1003. |
Wilting occurs whenA. rate of transpiration is higher than absorptionB. rate of absorption is higher than transpirationC. excess root pressureD. high relative humidity of air |
| Answer» Correct Answer - A | |
| 1004. |
Water potential is maximum is case ofA. Pure waterB. `2%` glucoseC. `10% ` glucoseD. `10%` NaCI |
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Answer» Correct Answer - A Water potential is maximum in case of pure water |
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| 1005. |
Permanent wiliting can be over come byA. increasing relative humidityB. supplying water to the soil around the plantC. supplying antitranspirantsD. All of the above . |
| Answer» Correct Answer - D | |
| 1006. |
The pressure exerted by the protoplaste due to entry of water against rigid walls that is calledA. Solute potentialB. Pressure potentialC. Osmotic pressureD. Turgor pressure |
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Answer» Correct Answer - B The pressure exxerted by the protoplasts due to entry of water against rigid walls is called p-ressure potential |
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| 1007. |
Root pressure is due toA. Active absorption/transportB. passive absorption/transportC. Indcreased transpirationD. Increased photoxynthesis |
| Answer» Correct Answer - A | |
| 1008. |
Water lost through transpiration isA. Pure waterB. Rich in organic solutesC. Rich in dissolved saltsD. All of the abvoe |
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Answer» Correct Answer - A Water lost through transpiration is pure water. |
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| 1009. |
Osmotic pressure of a soultion isA. More than that of pure solventB. Less than that of pure solventC. Variable dependidng upon concentrationD. Equal to that pure solvent |
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Answer» Correct Answer - A Osmotic pressure of a solution is more than that of pure solvent |
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| 1010. |
The movement of water from one cell of cortex to the next in the root is due toA. Water potential gradientB. Chamical potential graientC. Accumulation of inorganic salts in the cellsD. Accumulation of organic salts in the cells |
| Answer» Correct Answer - A | |
| 1011. |
The movement of water from one cell of cortex to the next in the root is due toA. Water potential gradientB. Chemical potential gradientC. Accumulation of inorganic salts in the cellsD. Accumulation of organic salts in the cells |
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Answer» Correct Answer - A The movement of water from one cell of cortex to the next in the root is due to water potential gradient. |
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| 1012. |
Water is transient in plants, less than 1 percent of the water reaching the leaves is used in photosynthesis and plant growth.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) |
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Answer» Correct Answer - C |
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| 1013. |
Transpiration rate of a dorsiventral leaf isA. higher on the lower surfaceB. higher on the upper surfaceC. equal on both the surfacesD. dependent upon species. |
| Answer» Correct Answer - A | |
| 1014. |
Water will move from the root hair through cortex if the water potentials areA. `{:("Root hair" , "Cortex" , "Xylem"),(0,0,0):}`B. `{:("Root hair" , "Cortex" , "Xylem"),(-2,-1,0):}`C. `{:("Root hair" , "Cortex" , "Xylem"),(0,-1,-2):}`D. `{:("Root hair" , "Cortex" , "Xylem"),(0,+1,+2):}` |
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Answer» Correct Answer - C If a difference in water potential exists between the two regions spontaneous movement of water will take place, provided the movement can occur between them, The direction of flow will be energetically down hill that is from the region of higher water potential (root hair) to the region of lower water potential (xylem) via cortex from less negative water potential `(e.g.,-1kPa)` ot more negative water potential `(e.g.,-2kPa)` |
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| 1015. |
Most plant meet their water need by ______ |
| Answer» Correct Answer - Transpiration pull | |
| 1016. |
The lowest water potentials in the xylem are in theA. root hairsB. vascular cylinders of rootsC. tracheids of the stemD. transpiring leaves . |
| Answer» Correct Answer - D | |
| 1017. |
Contribution of passive water absorption to total water absorption isA. `50%`B. `70%`C. `80-90% `D. `96-100%` |
| Answer» Correct Answer - C | |
| 1018. |
A column of water within xylem vessels of tall trees does not break under its weight because ofA. dissolved sugars in waterB. tensils strength of waterC. lignification of xylem vesselsD. positive root pressure |
| Answer» Correct Answer - B | |
| 1019. |
Cellulose microfibrills are oriented ________ rather than ________ making it easier for the stomata to open. |
| Answer» Radially , longitudinally | |
| 1020. |
_____ supplies water for photosynthesis. |
| Answer» Correct Answer - Transpiration | |
| 1021. |
Fill in the blands: (a) Some carrier of transport protenis allow diffusion only if two types of molecules move together. In ..... 1 ...... Both molecules, cross the membrane in the same directions, in ..... 2 ...... They move in opposite directions. (b) When a molecule moves across a membrane independent of other molecules, the process is called .... 3 .....A. 1-Uniport, 2-Symport, 3-AntiportB. 3-Uniport, 1-Symport, 2-AntiportC. 2-Uniport, 3-Symport, 1-AntiportD. 3-Uniport, 2-Symport, 1-Antiport |
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Answer» Correct Answer - B Some carrier or transport proteins allow diffusion only if two types of molecules move together. In symport both molecules cross the membrane in same direction, in antiport they move in opposite directions. (b) When a molecule moves across a membrane independent of other molecules, the process is called uniport. |
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| 1022. |
The lowest water potential is found in the xylem channels ofA. StemB. RootC. Root in the root hair zoneD. Leaves. |
| Answer» Correct Answer - A | |
| 1023. |
Water channels areA. Made up of eight similar types of aquaporinsB. Involved in active transportC. Involved in facilitated diffusionD. More than one option is correct |
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Answer» Correct Answer - C |
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| 1024. |
Usually the lower surface of a _____leaf has a greater number of stomata . |
| Answer» Correct Answer - Dorsiventral | |
| 1025. |
water channels are made up ofA. Eight similar types of aquapoinsB. Six similar types of aquaporinsC. Six different types of aquaporinsD. Eight different types of aquaporins |
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Answer» Correct Answer - D Water channels are made up of eight different types of aquaporins. |
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| 1026. |
Root pressure is usually acidic becauseA. increase in transpirationB. active absorptionC. low osmotic potential in soilD. passive absorption |
| Answer» Correct Answer - b | |
| 1027. |
Position and frequency of stomata can be determined byA. Calculating the loss of waterB. Cobalt chloride paper methodC. PotometerD. Porometer |
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Answer» Correct Answer - B |
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| 1028. |
Where does transpiration cohesion pull theory worksA. Active absorptionB. Passive absorptionC. Active and passive absorptionD. Apoplastic movements |
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Answer» Correct Answer - B Transpiration-cohesion tension theory operaties in passive absopation. |
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| 1029. |
Which of the following statement is correct?A. dpd=op-wpB. dep=op+wpC. dep=wp-opD. dep=tp+op |
| Answer» Correct Answer - a | |
| 1030. |
phloem sap is mainly made ofA. Water and sucroseB. Water and mineralsC. Oligosaccharides and hormonesD. |
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Answer» Correct Answer - A Phloem sap is mainly made of water and sucrose. |
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| 1031. |
Where does transpiration cohesion pull theory worksA. Active absorptionB. Inactive absorptionC. Active and inactive absorptionD. None of these |
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Answer» Correct Answer - b |
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| 1032. |
The removal of a ring of bark from trunk of a tree eventually kills it, sinceA. Mineral salts cannot go upB. Water cannot go upC. Food does not travel down and roots are starvedD. The exposed part becomes infected with fungi |
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Answer» Correct Answer - c |
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| 1033. |
Comment on the experimental setup. (a) What does the setup demonstrate ? (b) What will happen to the level of water if a blower is placed close to setup ? (c) Will the mercury level fluctuate (go up/down) if phenyl mercuric acetate is sprayed on leaves ? |
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Answer» (a) Transpirational pull is demonstrated by this set up. (b) Constant air blowing will increase the rate of transpiration so , level of water will go down. (c) The mercury level will go down, if phenyl mercuric acetate is sprayed on leaves. |
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| 1034. |
Read the following statements and find out the incorrect statement.A. Different proteins in the membrane play a major role in both active as well as passive transport.B. Pumps are the proteins that use energy to transport substances across the cell membrane from a low concentration to high concentration (downhill transport).C. Like enzymes the carrier protein is very specific in what it carrier across the membrane.D. Diffusion whether fcilitated or not-takes place only along a gradient and do not use energy. |
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Answer» Correct Answer - B Different proteins in the membrane play a major role in both active as well as passive transport. Pumps are the protein that use energy to transport substances across the cell membrane from a low concentration to high concentration (uphill transport) Like enzymes the carrier proteins is very specific in what it carries across the membrane. Diffusion whether facilitated or not takes place only along a gradient and do not use energy. |
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| 1035. |
A sufficient atmospheric pressure required to push the water upto the top of tall plants must beA. 2 atmB. 6 atmC. 20 atmD. All of the above |
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Answer» Correct Answer - c |
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| 1036. |
Force generated by transpiration can create pressure sufficient to lift water even upto the height ofA. 130 feetB. 130 metresC. 230 feetD. 230 metres |
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Answer» Correct Answer - B Force generated by transpiration can create pressure to lift water up to 130 meters. |
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| 1037. |
phloem sap is mainly made ofA. water and sucroseB. water andn mineralsC. oligosaccharides dn hormonesD. none of these |
| Answer» Correct Answer - a | |
| 1038. |
Match the following Columns. A. `{:(A,B,C,D),(2,1,4,3):}`B. `{:(A,B,C,D),(3,2,1,4):}`C. `{:(A,B,C,D),(4,1,2,3):}`D. `{:(A,B,C,D),(1,2,3,4):}` |
| Answer» Correct Answer - A | |
| 1039. |
Force generated by transpiration can create pressure sufficient to lift water even upto the height ofA. 130 feetB. 130 metreC. 230 feetD. 230 metre |
| Answer» Correct Answer - b | |
| 1040. |
Radial conduction of water takes place byA. vesselB. vessels and trachiedsC. phloemD. ray parenchyma cells |
| Answer» Correct Answer - d | |
| 1041. |
The force responsible for upward conduction of water against gravity comes fromA. transpirationB. photosynthesisC. translocationD. respiration |
| Answer» Correct Answer - A | |
| 1042. |
The osmotic pressure of the leaf cells is maximum in the afternoon, this shows relation with theA. high rate of respirationB. high rate of photosynthesisC. high rate of fat metabolismD. upward movement of water in plants |
| Answer» Correct Answer - D | |
| 1043. |
Which of the following contributes about 1% of the total transpiration in plants ?A. Bark transpirationB. Cuticular transpirationC. Lenticular transpirationD. Stomatal transpiration |
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Answer» Correct Answer - A |
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| 1044. |
Chesion force existing amonget water molecules contributes toA. plasmolysisB. Christian WolfC. OsmosisD. Translocation |
| Answer» Correct Answer - B | |
| 1045. |
Root pressure does not take an active part in the ascent of sap becauseA. it is not found in all the plants and water can rise in the absence of roots .B. it is seen during most favourable periods like spring or rainy season.C. it is never found to exist in the plants .D. (1) and (2) are correct. |
| Answer» Correct Answer - D | |
| 1046. |
Cohension transpiration pull theory operates inA. passive water absorptionB. active water absorptionC. conditions favouring guttationD. conditions restricting transpiration |
| Answer» Correct Answer - A | |
| 1047. |
Which contributes most to the transport of water from the soil to the leaves of a tree ?A. Root pressureB. Cohesion of water and transpiration pullC. Capillary rise of water inside xylemD. Hydrolysis of ATP |
| Answer» Correct Answer - B | |
| 1048. |
Movement of `H_(2)O` through cell wall is calledA. SymplastB. ApoplastC. TonoplastD. All of these |
| Answer» Correct Answer - B | |
| 1049. |
Movement of `H_(2)O` through cell wall is calledA. ApoplastB. SymplastC. TonoplastD. None of these |
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Answer» Correct Answer - A |
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| 1050. |
During transport of sugar or amino acid through cell membraneA. `Na^(+)` ions move against the direction of concentration gradientB. `Na^(+)` ions move in both directions irrespective of its concentration gradientC. No net `Na^(+)` ions movementD. `Na^(+)` ions move in the direction of its concentration gradient |
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Answer» Correct Answer - a |
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