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.
| 201. |
Minerals absorbed by the roots travel up the xylem. How do they reach the parts where they are needed most ? Do all the parts of the plant get the same amount of the minerals ? |
|
Answer» The minerals absobed are transported up the stem, to all parts of plant through the transpiration stream. The chief sinks for the mineral elements are the growing region of the plant, such as the spical and lateral meristems, young leaves, developing flowers, fruits, seeds and the storage organs. Unloading of the mineral ions occurs via fine ending through diffusion and active uptake by the cells. In plants, xylem are involved in transport of inorganic nutrients where phloem transport only organic materials. Mineral ions are frequently remobilised from older parts of plant like leaves to the younger regions. elements most readily mobilisal are phosphrous, sulphur, nitrogen, potassium, and some elements that forms the structurel component are not remobilised e.g., calcium. |
|
| 202. |
In a passive transport across a membrane. When two protein molecules move in opposite direction and independent of each other, it is called as ...... . |
| Answer» Antiport This process facilitates transport of molecules in both the directions across the membrane and their movement is independent of each other. | |
| 203. |
In a passive transport across a membrane when two protein molecule move in appsite direction and independent of each othr it is called as …………. |
| Answer» Correct Answer - Antiport | |
| 204. |
The type of diffusion in which substances move across the membrane along their concentration gradient in the presence of certain carriers or transport proteins is called asA. simple diffusionB. facilitated diffusionC. osmosisD. active transport. |
|
Answer» Correct Answer - B The diffusion of hydrophilic substances along the concentration gradient through fixed membrane transport proteins without involving energy expenditure, is called facilitated diffusion. Facilitated diffusion is very Specific as it allows cell to select substances for uptake. It is sensitive to inhibitors as well as show saturation effect. Two major types of transport proteins are known viz, carrier proteins carriers, transporters) and channel proteins. Carrier proteins bind the particular solute to be transported and deliver the same to the other side of the membrane. |
|
| 205. |
Refer to the given figure and identify `P,Q,R` and `S`. A. `{:(P,Q,R,S),({:("Facilitated"),("diffusion"):},{:("Simple"),("diffusion"):},{:("Active"),("transport"):},{:("Passive"),("transport"):}):}`B. `{:(P,Q,R,S),({:("Simple"),("diffusion"):},{:("Facilitated"),("diffusion"):},{:("Passive"),("transport"):},{:("Active"),("transport"):}):}`C. `{:(P,Q,R,S),({:("Simple"),("diffusion"):},{:("Facilitated"),("diffusion"):},{:("Active"),("transport"):},{:("Passive"),("transport"):}):}`D. `{:(P,Q,R,S),({:("Facilitated"),("diffusion"):},{:("Simple"),("diffusion"):},{:("Passive"),("transport"):},{:("Active"),("transport"):}):}` |
| Answer» Correct Answer - B | |
| 206. |
In passive transport across a membrane, when two protein molecules move in opposite direction it is called asA. uniportB. antiportC. symportD. co-port. |
| Answer» Correct Answer - B | |
| 207. |
Read the assertion and reason carfully to mark the correct option in question. Assertion: Transport proteins of endodermal cells are control points. Reason: At control points plant adjusts the quantity and types of solutes that reach the xylem.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
|
Answer» Correct Answer - A Transport proteins of endodermal cells are control points because at control points a plant adusts the quantity and tupes of solues that reach the xylem |
|
| 208. |
Read the assertion and reason carfully to mark the correct option in question. Assertion: Root endodermis has the the ability to actively transport ions in one direction only. Reason: Endodermal cells have suberin depostion.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
|
Answer» Correct Answer - A Root endodermis has the ability to actively transport ions in one direction only as endodermal cells have suberin deposition. |
|
| 209. |
Find out A,B,C,D,E,F and G indicating either "yes" or "no" in the given table. `{:("Property","Simple Diffusion","Facilitated Diffusion","Active Transport"),("(i) Highly selective","No","A","B"),("(ii) Transport saturates","C","D","Yes"),("(iii) Requires ATP ","E","F","G"):}` |
| Answer» A=Yes , B=Yes , C= No, D=Yes , E= No , F =No , G = Yes | |
| 210. |
Select the incorrect statement regarding facilitated diffusion.A. lt is a very specific process.B. lt is a passive process.C. lt helps the hydrophilic substances to be transported across the membrane.D. lt is faster then active process. |
| Answer» Correct Answer - D | |
| 211. |
The given figure shows transport of two molecules `A` and `B` through three different modes of facilitated diffusion. Select the correct option regarding it. A. `{:(,I,II,III),((a),"Uniport","Symport",Antiport"):}`B. `{:(,I,II,III),((a),"Uniport","Antiport","Symport"):}`C. `{:(,I,II,III),((a),"Antiport","Uniport","Symport"):}`D. `{:(,I,II,III),((a),"Antiport","Symport","Uniport"):}` |
| Answer» Correct Answer - B | |
| 212. |
Facilitated diffusionA. needs a carrier proteinB. is an active processC. occurs against the concentration gradientD. needs ATP. |
| Answer» Correct Answer - A | |
| 213. |
Read the assertion and reason carfully to mark the correct option in question. Assertion: Facilitated diffusion and active transport show characteristics of being highly selective, they are liable to saturat, respond to inhibitors and are under hormonal regulation. Reason: Membrane proteins are reponsible for both facilitated diffusion and active transport.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
|
Answer» Correct Answer - A Facilitated diffusion and active transport show common characteristice of being highly selective, they are liable to saturate, respond to inhibitor and are under hormonal ragulation because membrane proteins are responsible for both facilitated diffusion and active transport. |
|
| 214. |
Facilitated diffusion involving membrane proteins is categorised under pasive transport why? |
| Answer» Factilitated diffusion involvied special protein lined channedl situted in cell memebranes which provide sites for the movement of molecules they do not set up a concetration gradient and do not utilize energy since energy is not used up infacilitated diffusion it is called passive transport | |
| 215. |
Which of the following process requires membrane proteins ?A. Simple diffusionB. ImbibitionC. Facilitated diffusionD. More than one option is correct |
|
Answer» Correct Answer - C |
|
| 216. |
Ascent of sap isA. upward movement of water in plantsB. downward movement of water in plantsC. upward and downward movement of water in plantsD. None of the above |
| Answer» Correct Answer - A | |
| 217. |
Assertion:Waxy and cutin coating on plant parts reduce the transpiration. Reason:These adaption are found in xerophytes.A. If both Assertion and Reason are true and the Reason is a correct expanation of the AssertionB. If both Assertion and Reason re true but Reason is not a correct eplanatin of the AssertionC. If Assertion is true but the Reason is falseD. If both Assertion and Reason are false |
| Answer» Correct Answer - b | |
| 218. |
Common between guard cells and mesophyll cells isA. Dumbell shapedB. Differentially thick wallsC. Presence of chloroplastsD. Uniformly thin cell wall . |
| Answer» Correct Answer - C | |
| 219. |
main funcation of lenticel isA. TranspirationB. GuttationC. BleedingD. Gaseous exchange . |
| Answer» Correct Answer - D | |
| 220. |
Use of excessive fertilisers causes wilting due toA. endomosisB. exomosisC. imbibitionD. none of these. |
|
Answer» Correct Answer - B Excessive use of ferilisers causes exosmosis In such condition , osmotic withdrawal of water from all parts of plant takes place This kind of loss of water causes wilting in plant. |
|
| 221. |
A leaf with more stomata on lower surface belongs toA. Potato typeB. Oat typeC. Apple-mulberry typeD. Nymphaea type |
| Answer» Correct Answer - A | |
| 222. |
In most of the thin leaf mesophytes, the leaf stomata open during day and close night. It comes underA. Barley typeB. Potato typeC. Alfalfa typeD. Bean type |
| Answer» Correct Answer - C | |
| 223. |
In most of the thin leaf mesophytes, the leaf stomata open during day and close night. It comes underA. Barely typeB. Potato typeC. Alfalfa typeD. Bean type |
|
Answer» Correct Answer - C |
|
| 224. |
Wilting of a plant results from excessiveA. RespirationB. PhotosynthesisC. AbsorptionD. Transpiration |
|
Answer» Correct Answer - D |
|
| 225. |
Stomata on the surface of the leaf, open byA. Decreasing the solute concentration in the guard cellsB. Increasing the solute concentration in the guard cellsC. Weakening of the cell walls of the guard cells to allow them to stretchD. Increasing the water potential in the guard cells |
|
Answer» Correct Answer - B |
|
| 226. |
Stomata in grass leaf areA. dumb bell shapedB. kidney shapedC. rectangualarD. barrel shaped |
| Answer» Correct Answer - a | |
| 227. |
Observe the diagram of stomatal apparatus. In which of the following all the three parts labelled as A, B and C are correctly identified A. A - Guard cell, B - Stomatal aperture, C - MicrofibrilB. A - Stomatal aperture, B - Guard cell, C - MicrofibrilC. A - Microfibril, B - Guard cell, C - Stomatal apertureD. A - Microfibil, B - Stomatal aperture, C - Guard cell |
|
Answer» Correct Answer - C |
|
| 228. |
Which of the following statement is not true for stomatal apparatusA. Cellulose microfibrils are arranged longitudinally to axis to stomataB. Subsidiary cells are located as modified epidermal cellsC. Guard cells may be ellipsoidal in monocotsD. Inner walls of guard cells are thick and elastic |
|
Answer» Correct Answer - A |
|
| 229. |
In a stomatal apparatus , cellulosic microfibril are orientedA. Longitudinally on subsidiary cellsB. Radially in the cell walls of guard cellsC. Radially and longitudinally in wall of guard cellsD. Longitudinally on both guard cells |
|
Answer» Correct Answer - B |
|
| 230. |
Given below is the diagram of a stomatal apparatus . In which of the following all the four parts labelled as A , B,C and D are correctly identified ? A. A- Subsidiary cell B-Epidermal cell C-Guard cell D- Stomatal apertureB. A- Guard cell B- Stomatal aperture C-Subsidiary cell D-Epidermal cellC. A-Epidermal cell B- Guard cell C- Stomatal aperture D- SubsidiaryD. A-Epidermal cell B- Subsidiary cell C-Stomatal aperture D- Guard cell |
|
Answer» Correct Answer - D |
|
| 231. |
Which of the following statement is not true for stomatal apparatusA. Inner walls of guard cell are thickB. Guard cells invariably possess chloroplasts and mitochondriaC. Guard cells are always surrounded by subsidiary cellsD. Stomata are involved in gasesous exchange . |
|
Answer» Correct Answer - C |
|
| 232. |
Given below is the diagram of a stomatal apparatus in which of the following all the four poarts labelled as A,B,C and D are correctly indentified? A. epideermal subsidiary stomatal guardB. guard stomatal subsidariyC. epidermalD. epidermal guard stomatla subsidiary |
| Answer» Correct Answer - a | |
| 233. |
How water rises from the rhizoids of Riccia to its assimilatory filaments ? It is throughA. OsmosisB. Root pressureC. CapillaryD. Transpiration pull |
|
Answer» Correct Answer - A |
|
| 234. |
Choose the correct combination of labelling of stomatal apparatus of dicot and monocot leaves A. A = epidermal cells, B = subsidiary cells, C = chloroplast, D = guard cells, E = stomatal apertureB. A = epidermal cells, B = guard cells, C = chloroplst, D = subsidiary cells, E = stomatal apertureC. A = epidermal, B = subsidiary cells, C =chloroplast, D = stomatal aperture, E = guard cellsD. A = subsidiary cells, B = epidermal cells, C = chloroplast, D = stomatal cells, E = guard cells |
|
Answer» Correct Answer - A |
|
| 235. |
This plant is ideal to demonstrate ascent of sapA. rose plantB. balsam plantC. coconut plantD. cucumber plant |
| Answer» Correct Answer - B | |
| 236. |
In order to demonstrate root pressure, the plant is given a cutA. At the tipB. Transition zoneC. A few centimetres above the soilD. A few centimetres belwo the soil |
|
Answer» Correct Answer - C In order to demonstrate root pressue, the plant is given a cut a few centimetres above the soil |
|
| 237. |
A plasmolysed cell can be deplasmolysed by placing it inA. Isotonic solutioB. Hypertonic solutionC. Saturated solutionD. Pure water or hypotonic solution |
|
Answer» Correct Answer - D |
|
| 238. |
Plant cell plasmolysed in a solution which is If a cell reduced in size on placing in a solution of sugar, the solution isA. HypotonicB. HypertonicC. IsotonicD. Concentration no means |
|
Answer» Correct Answer - B |
|
| 239. |
A plasmolysed cell can be deplasmolysed by placing it inA. pure water or hypotonic solutionB. hypertonic solutionC. isotonic solutionD. saturated solution. |
|
Answer» Correct Answer - A the swelling up of a plasmolysed protoplast under the influence of hypotonic solution or water is called deplasmolysis It is due to endosmosis Deplasmolysis is possible only immediately after plasmolysis otherwise the cell protoplast becomes permanently damaged. During deplasmolysis water diffuses into protoplast. |
|
| 240. |
Statement`: Plant cells do not rupture when placed in distilled water. Statement 2: Animal cells rupture when placed in distilled waterA. Both statements`1` and`2`are correct.B. Statement`1` is correct but statement `2`is incorrect.C. Statement `1`is incorrect but statement `2` is correct.D. Both statements `1`and`2`are correct. |
|
Answer» Correct Answer - A when a plant cell is placed in pure distilled water the water enters into the cell .Cell wall is outer rigid protective and supportive covering of a plant cell, which prevents the bursting of plant cell by inhibiting excessive endosmosis On the other hand animal cells rupture if they are placed in distilled water due to the absence of cell wall. |
|
| 241. |
Statement `1:` Plasmolysis is bursting of cell membrane when a cell is kept in a hypertonic solution. Statement`2:` Hypertonic solution causes endosmosis.A. Both statements `1`and `2` are corect.B. Statement`1` is correct but statement `2` is incorrect.C. Statement `1`is incorrect but statement `2` is correct.D. Both statements `1` and `2`are incorrect. |
| Answer» Correct Answer - D | |
| 242. |
Guard cells differ from epidermal cells in havingA. mitochondriaB. vacuolesC. cell wallD. chloroplast |
| Answer» Correct Answer - D | |
| 243. |
Guard cells differ from epidermal cells in havingA. MitochondriaB. VacuolesC. Cell wallD. Chloroplasts |
|
Answer» Correct Answer - D Guard cells differ from differ form epiderma cells in having chloroplasts. |
|
| 244. |
Expanin the following terms (i)Guttaion (ii) wilting (iii) imbibition (iv) chelator |
| Answer» (i)Loss of water in the form of liquid drops is called guttation it ususally occurs due to root pressure (ii)The sympotoms such as drooping rolling or folding of eaves and young stem that apperar in plants due to scarity of water are termed as wilting (iii) Imbibitionis the phenon=menon of adsorpiton of water or any other liquid by the solid paritcles of a substacne without forming a solution (iv) A chelator or chelating agent is a chemical substance that reacts with insoluble divalent or trivalned metal catins in nutrient solutin to convert them in to soluble products (chelate) so that they are asbsorbded by the plants | |
| 245. |
Salt is applied to tennis lawns to kill weeds. How does salting tennis lawns help in killing of weeds without affecting the grass ? |
| Answer» Salt solution being hypertonic, causes exo=osmosis in plants. 1 cup salt in 2 cup of water, fairly well dissolved when sprayed on weed plants, start killing them. This salt concentration is then increased in subsequent sprays, if the weeds are still thriving in the field. | |
| 246. |
What occupies the spece between the cell walll and the shrunken protoplast in the plasmolysed cell? |
| Answer» The space left between the cell wall and the shruken protoplast in the plasmolysed cell is filled with external solution. | |
| 247. |
Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using the following options.A. Both processes can happen together because the diffusion coefficient of water and `CO_(2)` is differentB. The above processes happen only during night time.C. One process occurs during day time , and the other at night .D. Both processes cannot happen simultaneously |
| Answer» Correct Answer - A | |
| 248. |
Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using the following options.A. Both processes can happen together because the diffusion coefficient of water and `CO_(2)` is diffeentB. The above processes happen only during night timeC. One process occurs during day time and the other at nightD. Both processes cannot happen simultaneously |
|
Answer» Correct Answer - A Diffusion of water vapour and `CO_(2)` are independent process. Their diffusion depends on the difference in their partial pressure in the atmosphere as well as inside the leaves. |
|
| 249. |
Root pressure develops due toA. active absorptionB. low osmotic optential in soilC. passive absorptionD. increase in transpiration |
|
Answer» Correct Answer - A Root pressure is the positive pressure that develops in the roots of plants by the active absorption nutrients from the soil. When the nutrients are actively absorbed by root hairs, water (along with minerals) increases the pressure in the xylem. This pressure pushes water up to small hights. |
|
| 250. |
Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using the following options.A. One process occurs during the day time , and the othet at nightB. Both processes cannot happen simultaneouslyC. Both processes can happen together because the diffusion coefficient of water and `CO_(2)` is differentD. The above processes happen only during night time |
|
Answer» Correct Answer - C |
|