Practice Test


Q1) Plants absorbs water by Show Answer


Q2) Maximum water is lost to the atmosphere through transpiration by Show Answer


Q3) ________ is the main source of water for plants. Show Answer


Q4) Which type of water is available to the plants ? Show Answer


Q5) Dry seeds when placed in water swell due to Show Answer


Q6) When a cell is fully turgid, which one of the following is zero ? Show Answer


Q7) Phenomenon of plasmolysis occurs when Show Answer


Q8) Which of the following statements is CORRECT ? Show Answer


Q9) The hydraulic pressure developed inside the cell on the cell wall due to endosmosis is called Show Answer


Q10) The pressure on the plant cell walls due to the entry of water is called Show Answer


Q11) Which of the following is/are hydrophilic substances ? Show Answer


Q12) Hydroponics is the process of growing plants in Show Answer


Q13) The movement of water from higher water potential to lower water potential through a semi permeable membrane is called Show Answer


Q14) _______ acts as an activator for enzyme nitrate reductase. Show Answer


Q15) Osmosis involves diffusion of Show Answer


Q16) The osmotic parameter determining the flow of water from one cell to another is Show Answer


Q17) Osmosis is the diffusion of a solution of a weaker concentration, when both are separated by semipermeable membrane. What is the error in this statements ? Show Answer


Q18) If a plant cell is immersed in water, the water continues to enter the cell until the Show Answer


Q19) "The cell wall is a permeable membrane" can be best deducted from the passage of water and minerals salts from Show Answer


Q20) An example of a selectively permeable membrane is Show Answer


Q21) Turgidity of the cell maintained by Show Answer


Q22) Plasma membrane controls Show Answer


Q23) DPD stands for Show Answer


Q24) All of the following event involve osmosis except Show Answer


Q25) The actual pressure with which water enters into the cell is called Show Answer


Q26) Selective permeability identifies the process of Show Answer


Q27) In plants, the semipermeable membrane allows the diffusion of Show Answer


Q28) Molecules move inside and outside living cells by Show Answer


Q29) The movement of solute particles from a region of higher concentration is termed as Show Answer


Q30) A cell is plasmolyzed after being kept in a hypertonic solution. What will be present between cell wall and plasmalemma ? Show Answer


Q31) Osmotic pressure in a vacuolated plant cell is usually Show Answer


Q32) In hypertonic solution, the water potential of a cell Show Answer


Q33) When a cell is fully turgid, which of the following will be zero ? Show Answer


Q34) Osmotic pressure is responsible for the turgidity of plant cells which Show Answer


Q35) DPD is equal to Show Answer


Q36) Uniformly sweet taste of a cup of tea is due to Show Answer


Q37) In pickles, spoilage is rare due to Show Answer


Q38) A cell placed in strong salt solution will shrink because Show Answer


Q39) Plant cells do not burst in distilled water because the cell wall is Show Answer


Q40) The magnitude of diffusion pressure deficit in non-turgid cell is equal to Show Answer


Q41) A plasmolyzed cell can be deplasmolyzed by placing it in Show Answer


Q42) Due to plasmolysis, the plant cell Show Answer


Q43) When water moves through a semipermeable membrane, then which of the following pressure develops ? Show Answer


Q44) Ina plant cell, the shrinking of protoplasm is called Show Answer


Q45) Wooden doors swell up and get stuck during the rainy season. This is due to the phenomenon of Show Answer


Q46) In plants, water moves from Show Answer


Q47) Movement of molecules of gases, liqiuds and solutes from a region of higher concentration to a region of lower concentration is called Show Answer


Q48) The lowest water potential in xylem is in the Show Answer


Q49) Purple cabbage leaves do not lose their colour in cold water but do so in boiling water because Show Answer


Q50) Plant cell kept in saline drop will Show Answer


Q51) A red blood cell was kept in certain solution for a few minutes and it got burst. The said solution was Show Answer


Q52) Which of the following is against concentration gradient ? Show Answer


Q53) During absorption of water by roots, the water potential of cell sap is lower than that of Show Answer


Q54) The movement of water from one cell of the cortex to the adjacent one in roots is due to Show Answer


Q55) Water potential in the leaf tissue is positive (+ve) during Show Answer


Q56) If a cell is reduced in size when placed in a solution, the solution is Show Answer


Q57) With decrease in turgidity of a cell surrounded by water, the wall pressure will Show Answer


Q58) What will be the nature of sugar solution if the cells of an epidermal peel of Rhoeo discolor shows plasmolysis ? Show Answer


Q59) Plant cells submerged in distilled water will become Show Answer


Q60) Endosmosis of water occurs when in comparison with the outer solution, the water potential of cell sap is Show Answer


Q61) The restoration of turgidity in a plasmolyzed cell, when placed in a hypotonic solution is caused by Show Answer


Q62) To initiate plasmolysis in plant cells, the salt solution used is Show Answer


Q63) Diffusion pressure deficit of a fully turgid cell is equal to Show Answer


Q64) Which one is a unit of measurement of water potential ? Show Answer


Q65) The term water potential was proposed by Show Answer


Q66) A thin slice of sugar beet placed in concentrated solution of NaCl would Show Answer


Q67) Risk of spoilage is less in salted pickles due to Show Answer


Q68) Which of the following can preserve food stuffs ? Show Answer


Q69) The initial stage or first step of water absorption by root cells is Show Answer


Q70) Three compartments of a cell are Show Answer


Q71) The unique property of water is Show Answer


Q72) If cells completely lack turgor pressure, they are said to be Show Answer


Q73) Water potential of an actively absorbing cell is Show Answer


Q74) Cell wall is permeable to Show Answer


Q75) How many regions are there in a typical root ? Show Answer


Q76) Cell wall of root hair is formed by which components ? Show Answer


Q77) Which property of cellulose and pectic compounds help root hairs to absorb water ? Show Answer


Q78) Plasma membrane is Show Answer


Q79) In apoplast pathway, how does the movement of water take place ? Show Answer


Q80) In symplast pathway, water travels through Show Answer


Q81) Which of the following is a rapid type of absorption ? Show Answer


Q82) Water will be absorbed by root hairs when the external medium is Show Answer


Q83) Root hairs occurs in the zone of Show Answer


Q84) The phenomenon of uptake of water at the expense of energy by the cell and usually against the osmotic gradient is known as Show Answer


Q85) Absorption of water by a root is increased by Show Answer


Q86) Water will be absorbed by root hairs when Show Answer


Q87) In plants, maximum absorption of water takes place in the zone of Show Answer


Q88) The active transport of substances across the plasma membrane is done with the help of Show Answer


Q89) Many transplanted seedlings may not survive Show Answer


Q90) The roots of land plants can absorb water Show Answer


Q91) After heavy rainfall with poor drainage, leaves of many plants wilt due to Show Answer


Q92) Prolonged water-logging kills plants due to Show Answer


Q93) Rate of water absorption is slow near frrezing point because Show Answer


Q94) Water enters root hairs due to Show Answer


Q95) In absorption of water, the root cap has no significant role because Show Answer


Q96) Outer layer of vacuole is called Show Answer


Q97) Movement of water in the cortex of root from outside to inside is due to Show Answer


Q98) For active absorption ________ is needed. Show Answer


Q99) Attraction between water molecule is due to Show Answer


Q100) The most widely accepted theory for ascent of sap in tree is Show Answer


Q101) The continuation of excretion of watery liquid for sometime from the stump of a well watered plant, after cutting off the shoot slightly above the base, is due to Show Answer


Q102) Water in plants is transported by Show Answer


Q103) Cohesion-tension theory operates in Show Answer


Q104) Dixon and Jolly are associated with Show Answer


Q105) Cohesion theory is related to Show Answer


Q106) If cohesion-tension transpiration theory is correct, then break in water column in xylem vessels should Show Answer


Q107) Which of the following plants is ideal to demonstrate ascent of sap ? Show Answer


Q108) Path of water movement from soil to xylem is Show Answer


Q109) A tree girdled upto xylem may survive for some time but ultimately dies because Show Answer


Q110) During cohesion theory, the upward pull of water from bottom to top by cohesion molecules is due to Show Answer


Q111) Attraction force of cell walls for water molecules is termed as Show Answer


Q112) Ascent of sap in plants explains Show Answer


Q113) Dixon and Jolley's theory most satisfactorily illustrates the rate of ascent of sap on the basis of Show Answer


Q114) When the physical forces are taken into consideration to explain the ascent of sap in Dixon's theory, it includes Show Answer


Q115) Ascent of sap refers to the movement of water from Show Answer


Q116) Transpiration is very important for plants because it helps in Show Answer


Q117) Stomatal opening and closing is due to Show Answer


Q118) The specialized epidermal cells surrounding guard cells are called Show Answer


Q119) The ultimate cause for the movement of water against gravity in a tree is Show Answer


Q120) Transpiration pull will be maximum under which of the following conditions ? Show Answer


Q121) Stomata open at night and close during day time in Show Answer


Q122) Transpiration occurs when the outer atmosphere Show Answer


Q123) Guard cells differ from epidermal cells as they have Show Answer


Q124) Stomatal opening is under the control of Show Answer


Q125) Maximum transpiration takes place from Show Answer


Q126) Stomata open during day time because the guard cells Show Answer


Q127) Transpiration occurs from Show Answer


Q128) In which of the following plants would metabolism be hindered if the leaves are coated with wax on their upper surface ? Show Answer


Q129) What percentage of water absorbed by herbaceous plants is lost in transpiration ? Show Answer


Q130) Absorption of water by root is increased with the Show Answer


Q131) Transpiration is high in Show Answer


Q132) Of the processes which occur in leaves, the one which may lower their temperature (cooling effect) is Show Answer


Q133) Stomata opens when guard cells are Show Answer


Q134) A leaf twig of mesophytic plant dipped in water would demonstrate Show Answer


Q135) Which is not related to transpiration ? Show Answer


Q136) Transpiration is dependent upon Show Answer


Q137) The chlorphyllous cells which are fewer in number, unique in shape with thicker inner walls are known as Show Answer


Q138) Water lost through transpiration is Show Answer


Q139) The common characteristic between guard cells and mesophyll cells is Show Answer


Q140) Root pressure is maximum when Show Answer


Q141) Wilting appears due to excessive Show Answer


Q142) Which of the following factors is most important in the regulation of transpiration ? Show Answer


Q143) Transpiration is least in Show Answer


Q144) Guard cells regulate Show Answer


Q145) Which does not cause stomatal opening ? Show Answer


Q146) Stomata generally operate in response to Show Answer


Q147) Stomata open in daytime due to Show Answer


Q148) Epidermal cells containing chloroplasts are Show Answer


Q149) Each stoma is surrounded by Show Answer


Q150) Main function of lenticle is Show Answer


Q151) In which of the following groups is stomata absent ? Show Answer


Q152) "Transpiration is a necessary evil", this sentence was given by Show Answer


Q153) In plants, the process of transpiration helps in Show Answer


Q154) Stomata closes due to __________ in guard cells. Show Answer


Q155) Last step in stomatal transpiration is Show Answer


Q156) Which of the following is not possible in plants without transpiration ? Show Answer


Q157) The rate of transpiration is highest in the Show Answer


Q158) __________ is the chief constituent of protoplasm. Show Answer


Q159) Water acts as a ____________ in cell. Show Answer


Q160) Which property of water makes it a temperature stabilizer ? Show Answer


Q161) The direction of movement of food in pholem is Show Answer


Q162) Translocation of food takes place through Show Answer


Q163) Which one of following structures between two adjacent cells is acting as an effective transport pathway ? Show Answer


Q164) Carbohydrates are stored in plants in the form of Show Answer


Q165) In vascular tissue which is the main conducting element ? Show Answer


Q166) how many elements are essential elements ? Show Answer


Q167) Generally, chemical analysis of plant shows the presence of _________ different elements. Show Answer


Q168) Which of the following is not a micronutrient ? Show Answer


Q169) Which of the following is a macronutrient ? Show Answer


Q170) Plants require sulphur for Show Answer


Q171) Non -mineral elements are Show Answer


Q172) Growth of plants in soil less aqueous medium is known as Show Answer


Q173) Macronutrients are the nutrients required in Show Answer


Q174) Which pigment is essential for photosynthesis ? Show Answer


Q175) Deficiency of calcium causes Show Answer


Q176) In passive absorption, by which process does movement of mineral ions take place ? Show Answer


Q177) Respiratory inhibitor _________ the rate of mineral absorption. Show Answer


Q178) Which mineral deficiency causes stunted growth ? Show Answer


Q179) If oxygen content in the medium is less, then the rate of mineral absorption Show Answer


Q180) Minerals are absorbed in the form of Show Answer


Q181) Calcium is present in plants in the form of Show Answer


Q182) By which two methods does absorption of mineral ion takes place ? Show Answer


Q183) In active absorption which energy is required ? Show Answer


Q184) Calcium helps to Show Answer


Q185) Cell wall becomes __________ due to the lack of calcium. Show Answer


Q186) Whiptail disease in cauliflower occurs due to the deficiency of Show Answer


Q187) Which is produced during water stress that brings stomatal closure ? Show Answer


Q188) Which is the most important factor in regulation of transpiration ? Show Answer


Q189) Stomata open or close due to the ion Show Answer


Q190) Which of the following do not show transpiration ? Show Answer


Q191) Stomata opens due to Show Answer


Q192) How many elements are universally present in plants ? Show Answer


Q193) _________ is constituent of all amino acids. Show Answer


Q194) Which coenzymes are required in photosynthesis ? Show Answer


Q195) phosphorus is absorbed from the soil in the form of Show Answer


Q196) Which mineral is involved in the transfer of electron to PSII during non-cyclic photophosphorylation ? Show Answer


Q197) Dry wooden pieces, if driven into a small crack in a rock and then soaked, can develops enough pressure to split the rock. Such a pressure is developed due to Show Answer


Q198) When beet root cylinders are washed and placed in cold water, anthocyanin does not come out. This indicates that plasma membrane most likely is Show Answer


Q199) If a cell 'A' having osmotic pressure (OP) 10 atm and turgor pressure (TP) 5 atm is separated from a cell B by a semipermeable membrane which has OP of 15 atm and TP of 12 atm, then the flow of water would be Show Answer


Q200) If cell 'A' with OP=5 and TP = 4 is surrounded by the cells with OP = 3 and TP = 1, what will be the direction of water movement ? Show Answer


Q201) An innovative Professor who wanted to give a live demonstration of a physiological process, filled a glass bottle with previously moistened mustard seeds and water. He screw-capped the bottle and kept in away in a corner and resumed his lecture.
Towards the end of his lecture, there was sudden explosion with glass pieces of the bottle thrown around. Which of the following phenomena did the Professor want to demonstrate ? Show Answer


Q202) When a bottle of perfume is placed at one corner of a room and the lid is opened, the scent spreads all over the room after some time. This happens by the process of Show Answer


Q203) A higher plant cell impregnated with cutin and suberin is palced in water. What would happen after 15 minutes ? Show Answer


Q204) What will be the direction of net osmotic movement of water if a solution 'A' enclosed in a semipermeable membrane having an osmotic potential of 30 bars and turgor pressure of 5 bars is submerged in a solution B with an osmotic potential of 10 bars and 0 turgor pressure ? Show Answer


Q205) If a cell A with DPD 4 bars is connected to cells B, C, D whose OP and TP are 4 and 4, 10 and 5 and 9 and 3 bars respectively, the flow of water will be Show Answer


Q206) The conditions under which transpiration would be most rapid are Show Answer


Q207) Transport of food materials in higher plants takes place through Show Answer


Q208) Water potential can be determined by Show Answer


Q209) What are the aquaporins in facilitated diffusion process? Show Answer


Q210) When sugars enter sieve tubes, water flows by osmosis, resulting in Show Answer


Q211) The evaporative loss of water from the exposed part of plant is called Show Answer


Q212) Which one of the following is not related to guttation?
Show Answer


Q213) Whose water potential is less than water potential of root hair during the water absorption by
root hair? Show Answer


Q214) A thin film of water is held by the soil particles under the influence of internal attractive force. It
is called Show Answer


Q215) Study the following statement and choose the correct option(s) from the codes from below
I. Root pressure provides a light push in the overall process of water transport
II. Root pressure causes the flow of water faster through xylem than it can be lost by transportation
III. In symplast pathway, water move exclusively through the cell wall and intercellular spaces
IV. Guttation is a cause of transpiration pull
V. Most plants fulfill their water requirement by transpiration pull Show Answer


Q216) What is required for the transport of substances through a membrane from a region of lower
concentration to higher concentration? Show Answer


Q217) Which of the following statement is correct? Show Answer


Q218) In a plant organ, which is covered by periderm and in which the stomata are absent, some
gaseous exchange still takes place through Show Answer


Q219) Which one of the following is the reason for higher rate of transpiration in Sorghum as compared
to maize? Show Answer


Q220) If turgidity of a cell surrounded by water increases, the wall pressure will
Show Answer


Q221) In plants; which of the following are/is translocated through phloem? Show Answer


Q222) Root pressure is due to Show Answer


Q223) Choose correct statements regarding the flow of sap in xylem?
I. Flow is driven by higher concentration of sugar in the vessel elements
II. Flow from root to twigs and leaves would be reduced if leaves are removed
III. In the morning, sap begins to flow first in the twig then in trunk
IV. Rapid flow of water put tissues under pressure much more than atmospheric pressure Show Answer


Q224) Stomatal opening is regulated by Show Answer


Q225) The direction of movement in phloem is …A… and that of xylem is …B… . Choose the correct pair of options

Show Answer


Q226) Which of the following theories for ascent of sap was proposed by an eminent Indian scientist J C Bose? Show Answer


Q227) The potential energy of water is referred as Show Answer


Q228) If two solutions have the same osmoregularity, they are said to be Show Answer


Q229) Plant obtain carbon and most of their oxygen from Show Answer


Q230) When plant cell is kept in saline drip, cell
Show Answer


Q231) Carrier protein, which allows the diffusion of two type of molecules in the same direction is Show Answer


Q232) Hydroponics is the method of Show Answer


Q233) Imbibition is always accompanied by swelling or increase in the volume of imbibint However, the increase
in the volume of the imbibant is Show Answer


Q234) Which of the following is responsible for the transport of water and minerals from roots to stems, leaves,
flowers and fruits in rooted plants? Show Answer


Q235) Loss of liquid water by guttation occurs through
Show Answer


Q236) The process by which water is absorbed by solids like colloid causing them to increase in volume,
is called Show Answer


Q237) How will you distinguish between the method of transport between xylem and phloem? Show Answer


Q238) Which one of the following is not an antitranspirant?
Show Answer


Q239) Statoliths are involved in Show Answer


Q240) In plasmolysed cell, the space between nucleus and plasma membrane is occupied by
Show Answer


Q241) The sugarcane plant has
Show Answer


Q242) Water potential and osmotic potential of pure water is Show Answer


Q243) When pea seeds and wheat seeds are put in water, which of the two will imbibe more water? Show Answer


Q244) Nyctinasty and seismonasty in plants like bean and touch me not are produced due to Show Answer


Q245) Following statements are related with the diffusion of coloured molecules across a membrane. Select the
correct statement, which shows the fastest rate of diffusion? Show Answer


Q246) Choose the false statement Show Answer


Q247) Sunken stomata is found in the leaves of Show Answer


Q248) Who proposed cohesion theory of water movement in plants? Show Answer


Q249) Read the following statements and choose the correct option given below
I. Major account of transpiration takes places through surface/margin of leaves
II. A little amount of water is lost through stem, this is reffered to cauline transpiration
III. Transpiration is comparatively a slow process then evaporation
IV. Transpiration driven ascent of sap does not depend on cohesion, adhesion and surface tension
properties of water Show Answer


Q250) Direction of translocation of organic food or solutes, is
Show Answer


Q251) The water available to plants for absorption is
Show Answer


Q252) Which of the following theory gives the latest explanation for the closure of stomata? Show Answer


Q253) Why all the minerals present in soil can not be passively absorbed by roots? Show Answer


Q254) Which one is not the job of zone of cell differentiation in roots? Show Answer


Q255) which one is against the theory of ascent of sap given by Dixon and Jolly? Show Answer


Q256) Attraction of water molecules to polar surfaces is known as Show Answer


Q257) The epidermal trichomes help in Show Answer


Q258) In land plants, the guard cells differ from other epidermal cells in having Show Answer


Q259) Arrange the events of opening stomata in correct sequence and choose the correct option accordingly
I. Lowering of osmotic potential of guard cells
II. Decline in guard cell solute
III. Rise of potassium ion level in guard cells
IV. Guard cells absorb water from neighbouring epidermal cells
V. Guard cells become flaccid
VI. Guard cells swells and make a pore between them Show Answer


Q260) Water potential increases due to Show Answer


Q261) Why seeds imbibe and swell after keeping in water? Show Answer


Q262) If you are given a task to analyse phloem sap chemical, which of the following will be present in least
concentration? Show Answer


Q263) Some elements like calcium are not remobilised because they are Show Answer


Q264) Movement of molecules in three forms of matter, from a region higher concentration to a region of lower
concentration can be termed as Show Answer


Q265) In plants, water supply is due to Show Answer


Q266) Which part of root absorbs both water and minerals? Show Answer


Q267) Diffusion pressure deficit is also called Show Answer


Q268) Diffusion, a process occur(s) along the concentration gradient is actively involved in Show Answer


Q269) Which of the following mechanism can explain the transport of sucrose from source to sink? Show Answer


Q270) Which of the following cells are not related to the structure of stomata?
Show Answer


Q271) Water lost in Guttation is Show Answer


Q272) The approximate length of root hair zone in plants
Show Answer


Q273) When the conditions are dry, a grass leaf curls inward to minimize water loss due to the pressure
of Show Answer


Q274) Transpiration is measured by Show Answer


Q275) A cell swells up when kept in
Show Answer


Q276) Which of the following statements are true/false?
I. The positive hydrostatic pressure is called turgor pressure.
II. Wall pressure exerts to prevent the increase of protoplasm size.
III. Diffusion is more rapid in liquids than in gases.
IV. Diffusion of water through a semi-permeable membrane is called imbibition.
V. Osmosis is movement of substance, which takes place along a diffusion gradient. Show Answer


Q277) When a plasmolyzed cell is placed in a hypotonic solution then water will move inside the cell.
Which force causes this? Show Answer


Q278) Which one of the following denotes the water potential of the mesophyll cell in wilted condition? Show Answer


Q279) Sugar stored in roots may be mobilised to become a source of food in the Show Answer


Q280) Which of the following is the unit of measurement of water potential? Show Answer


Q281) Which type of water is used by the plants? Show Answer


Q282) Water in the vessel of xylem in tall plant is
Show Answer


Q283) A leaf peeling of Tradescantia is kept in a medium having 10% NaCl. After a few minutes, if we
observe the leaf peel under the microscope, we are likely to see Show Answer


Q284) Stomata which can open at night, are present in Show Answer


Q285) This hormone affects opening and closing of stomata.
Show Answer


Q286) Transport of gases, hormones, photosynthetase and organic solutes in plants is Show Answer


Q287) Fensom and Jones suggested, which of the following method for translocation of solute? Show Answer


Q288) Which statement can be shared by facilitated diffusion and active transport? Show Answer


Q289) Which of the following has maximum water potential? Show Answer


Q290) In plants, long distance transport of organic and inorganic substances occur through Show Answer


Q291) Xylem sap is made up of Show Answer


Q292) Passive absorption of mineral salts is not dependent on Show Answer


Q293) The pressure exerted by the protoplast due to the entry of water against the rigid cell wall is termed as Show Answer


Q294) Some statements are given regarding the active transport in plants. Choose the incorrect statement Show Answer


Q295) Root endodermis has the ability to actively transport ions …A… because of …B… .
Choose the correct pair Show Answer


Q296) The shape of guard cells in stomata in sugarcane plant is Show Answer


Q297) Plants develops force for upward conduction of water against gravity is derived from Show Answer


Q298) How translocation of organic material is explained in plants? Show Answer


Q299) Two cell (A and B) have osmotic potential and pressure potential – 18 bars and 8 bars, and – 14 bars and 2
bars respectively. What will be the direction of water flow? Show Answer


Q300) Which one of the following acts as a barrier in a apoplastic pathway?
Show Answer


Q301) Go through the following pairs and choose the correct pairs from the option given below
I. Nerium Sunken lower epidermis of leaves to
stomata reduces loss of water
II. Calotropis Non-succulent Root cells with thickened
cell walls
III. Peperomia Leaf succulent Leaf epidermal cell, store
water
IV. Ammophila Dicot Curl their leaves to minimise
loss of water
V. Tribulus Ephemeral Water is stored in stem Show Answer


Q302) Which pathway applies least resistance to the movement of water? Show Answer


Q303) During flowering, fruit ripening and development period in plants, which part of the plant act as source? Show Answer


Q304) Plants growing on hills are likely to show Show Answer


Q305) The transport of ions up the stem to all parts is through Show Answer


Q306) How much of absorbed water is lost during transpiration in a plant? Show Answer


Q307) Which one of the following is part of symplast? Show Answer


Q308) The real forces responsible for the movement of water from one cell to another cell is mainly Show Answer


Q309) Water occur freely in previous rocks and deep in soil above the impermeable strata is Show Answer


Q310) A twig kept in water having some salt remains fresh for longer period due to
Show Answer


Q311) If stem of plant is cut under a state of tension in xylem sap, what will be the result? Show Answer


Q312) One factor responsible for water rise up to 100 m of tall plant, is Show Answer


Q313) Read carefully the following statements and choose the right answer from the options given below
I. Diffusion is a slow process and it do not depends upon the living system
II. Usually process of diffusion does not need energy
III. Diffusion can occur from one part of a cell to another part of the same cell or from one cell to another
and from one tissue to another tissue
IV. Diffusion is a rapid process over short distance, but extremely slow over long distances Show Answer


Q314) Tension, one of the important factor in the movement of xylem sap in a tree is a result of Show Answer


Q315) What is the approximate dry weight contained by majority of herbaceous plants Show Answer


Q316) Root hair absorb water from the soil on account of Show Answer


Q317) The space between the plasma membrane and the cell wall of a plasmolyzed cell surrounded by a
hypertonic solution is occupied by the Show Answer


Q318) The first process by which water enters into the seed coat when a seed is placed in suitable
environment for germination is
Show Answer


Q319) In tall plants, because of which factor, continuous water column extends upward? Show Answer


Q320) What will happen, if a large amount of water enters in a plant cell? Show Answer


Q321) Identify true and false statements and select the correct option from the codes given below
I. As suction pressure increases, water absorption also increases which in turn increases the absorption of
ions
II. Absorption of ions is affected by transpiration pull
III. Large amount of charged particles are absorbed along with absorption of water
IV. Pressure flow hypothesis depends entirely on the existence of mechanism for loading sugars into
phloem at the source region and unloading it at the sink
V. Contents in the sieve tube move undirectionally Show Answer


Q322) Opening of stomata is not affected by Show Answer


Q323) Osmosis involves flow of Show Answer


Q324) Cohesion force, a feature of cohesion theory is also called Show Answer


Q325) A plant cell becomes turgid due to Show Answer


Q326) Which of the following experiments is called physiological demonstration of osmosis? Show Answer


Q327) Which of the following statements is/are true?
I.The apoplastic movement of water occurs exclusively through the cell wall without crossing any
membranes.
II.Solutes present in a cell (or in any solution) increase the free energy of water or water
potential.
III.The symplastic movement occurs from cell to cell through the plasmodesmata.
IV.Membrane permeability depends on the membrane composition, as well the chemical nature
of the solute. Show Answer


Q328) Which of the following maintains the shape of cell? Show Answer


Q329) Consider the following statements and choose the correct answer
I. Carrier proteins are needed by both facilitated diffusion and active transport and are sensitive to
inhibitors that react with protein side chain
II. Different types of proteins present in the membrane plays a major role in both active as well as passive
transport
III. The carrier proteins needed by facilitated and active transport are specific
IV. There is no need of energy to pump molecule against a concentration in active transport
V. Transport rate reaches to saturation point, when all the active proteins are used Show Answer


Q330) Root hair absorbs water from soil through Show Answer


Q331) Which type of soil has least water retaining capacity?
Show Answer


Q332) Phloem sap is mainly ….. and ….. . Choose the correct pair of options?
Show Answer


Q333) Passive absorption of water by the root system is the result of Show Answer


Q334) The rate if diffusion is dependent upon the permeability of the medium, it however Show Answer


Q335) If flowers are cut and dipped in dilute NaCl solution, then Show Answer


Q336) Munch hypothesis is based on Show Answer


Q337) Transpiration facilitates Show Answer


Q338) Which of the following is not correct regarding carrier molecules, involved in facilitated diffusion?
Show Answer


Q339) Which of the following is used as an antitranspirant? Show Answer


Q340) Study the following statements
I. Most minerals must enter the roots by active absorption into cytoplasm and epidermal cells
II. Ions are absorbed by both passive and active transport
III. Active absorption does not require energy
IV. Active uptake of ions is responsible for osmosis
Choose the correct option in reference to the statements given above Show Answer


Q341) Arrange the following events of mass flow of organic material in sequence
I. Sugars are transported from cell to cell in the leaf
II. Food is synthesised in form of glucose by leaf cells
III. Movement of water takes place into sieve tube elements
IV. Downward movement of sugar occurs in the stem
V. Solutes are actively transported into the sieve elements
Show Answer


Q342) Which of the following lacks stomata?
Show Answer


Q343) Guard cells control Show Answer


Q344) Wilting occurs when Show Answer


Q345) Which among the following represents the correct relationship for a plasmolysed cell? Show Answer


Q346) Water in the soil available to plants is Show Answer


Q347) The magnitude of root pressure ranges between Show Answer


Q348) Read the following statements regarding porins and select the correct option given below
I. Porins are transport proteins
II. Channel proteins are a type of transport protein, which are usually gated
III. Carrier protein binds the particular solute to be transported
IV. Particular solute is delivered to the other side of the membrane by carrier proteins Show Answer


Q349) RBC and a plant cell (with thick cell wall) are placed in distilled water. The solute concentration is
the same in both the cells. What changes would be observed in them?
Show Answer


Q350) When a cell is plasmolysed, it becomes Show Answer


Q351) Water is lost in a liquid state in some plants through hydathodes. These hydathodes Show Answer


Q352) Cell-A has osmotic potential of -18 bars and pressure potential of 8 bars, whereas, cell-B has
osmotic potential of -14 bars and pressure potential 2 bars. The direction of flow of water will be Show Answer


Q353) Which type of transpiration continues throughout day and night?
Show Answer


Q354) The first process responsible for the entry of water into a seed, when it is placed in a suitable environment
for germination is Show Answer


Q355) Read the given statements regarding the different stages of plasmolysis and choose the correct option
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 the cell wall
III. Protoplast gets detached from the cell wall and attains a spherical shape Show Answer


Q356) Water composition in a water-melon is approximately Show Answer


Q357) The membrane, which allows passage of certain substances more readily than others is termed as Show Answer


Q358) Which one of the following is not a part of symplast?
Show Answer


Q359) What is mandatory in the process of facilitated diffusion? Show Answer


Q360) A special type, which occurs when water is absorbed by solids causing them to increase in volume is called Show Answer


Q361) Which of the following does not affect water potential of water? Show Answer


Q362) Study the following pairs.
I. Peperomia Leaf succulent Leaf epidermal cells store water.
II.Calotropsis Non-succulent Root cells with thickend cell walls.
III. Tribulus Ephermeral Stem stores water.
IV. Ammophila Dicot plant Rolling in of leaves to check water loss
Identify the correct pair of answer. Show Answer


Q363) Consider the following statements and choose the correct option from codes given below
I. Loading of phloem is related to increase of sugar in phloem
II. Active loading of sugar in sieve tube of phloem is driven by proton pump
III. Pressure may be positive or negative in sieve tube cells
IV. Water and solutes move through the sieve tube against pressure gradient
V. Cytoplasmic strand passes through the holes in sieve plates and form continuous filaments Show Answer


Q364) Path of water movement from soil to xylem is
Show Answer


Q365) The stomata in CAM plants open during
Show Answer


Q366) What will be the affect of accumulation of potassium ions in guard cells? Show Answer


Q367) Through which process, starch of the guard cell is converted into PEP ions? Show Answer


Q368) Which one of the following does not help in molecular transport? Show Answer


Q369) Ascent of sap is Show Answer


Q370) Passage cells are thin-walled cells found in Show Answer


Q371) The term apoplast signifies Show Answer


Q372) Select the correct option in reference with the statements given below
I. Facilitated diffusion cannot cause net transport
II. Transport rate in case of facilitated diffusion never reaches to a maximum level
III. Facilitated transport is selective to inhibition proteins
IV. Concentration gradient is not required in case of facilitated diffusion Show Answer


Q373) Osmotic pressure of a solution is
Show Answer


Q374) Potometer works on the principle of Show Answer


Q375) In which of the following path, flow of water occurs from cell to cell through their protoplasm? Show Answer


Q376) Transport of minerals through xylem is
Show Answer


Q377) Mechanism of opening and closing of stomata is controlled by
Show Answer


Q378) Stomata are also called as
Show Answer


Q379) Hydathodes are also called Show Answer


Q380) What happens when concentration of solutes decreases in guard cells? Show Answer


Q381) During water absorption from the soil, the water potential of the root cell is…..than the soil Show Answer


Q382) Water potential gradient can be best defined as Show Answer


Q383) Humidity in atmosphere decreases rate of Show Answer


Q384) Guard cells help in Show Answer


Q385) Both minerals and water are absorbed by Show Answer


Q386) Fensom and Jones suggested which of the following method for translocation of solute?
Show Answer


Q387) Mycorrhiza, a mutal relationship between fungus and a root of gymnosperm helps in
I. absorption of water
II. mineral absorption
III. translocation
IV. gaseous exchange
Choose the correct option
Show Answer


Q388) Which of the following pair is selective and specific mode of transport? Show Answer


Q389) Consider the following statements and choose the correct answer from the options given below
I. A dry live seed still contains water
II. A mature maize plant absorbs about 3 L water per day
III. A mustard plant take up water equal to its weight in about five hours
IV. Water is not considered as the limiting factor for plant growth and productivity Show Answer


Q390) Which one is true about guttation? Show Answer


Q391) What are the location of casparian strips-which interrupts the movement of water inside a root? Show Answer


Q392) Select the correct statement from the following Show Answer


Q393) Which one of the following doesn’t help in molecule transport? Show Answer


Q394) What type of material do not diffuse or find it difficult to pass through the membranes? Show Answer


Q395) When the concentration of the soil solutes is low, the absorption of water Show Answer


Q396) If sugars are actively moving into a cell, what will happens to the turgor pressure of the cell? Show Answer


Q397) Read the following statements and choose the correct answer from the options given below Show Answer


Q398) Movement among cells against concentration gradient is called Show Answer


Q399) Transport proteins of endodermal cells are …A… where a plant adjusts the …B… and …C… of solutes that
reaches the …D…
Choose the correct combination of A-D from the given options Show Answer


Q400) 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 flaccid.
Show Answer


Q401) Choose, true and false statements from the following and select the correct option from the set (a-d) given
below
I. Diffusion is an important process of transport in plants since it is the only means for gaseous movement
within the plant body
II. In active transport, pumps are proteins that use energy to carry substance across the cell membrane
against concentration gradient
III. In facilitated diffusion, special proteins helps hydrophilic substances to be transported across the
membrane
IV. In diffusion, molecules move against concentration gradient in a random manner
V. Facilitated diffusion is faster than active transport Show Answer


Q402) Which one of the following is the most accepted theory of ascent of sap? Show Answer


Q403) At the time of seed germination, when water is absorbed by the seed due to imbibition, the seed coat
breaks as it swells to a lesser degree than the kernel because Show Answer


Q404) Unloading of minerals occur at Show Answer


Q405) Why the tropical deciduous forest trees shed their leaves? Show Answer


Q406) Which of the following affects the rate of diffusion? Show Answer


Q407) A student has taken a twig from a plant. She/he observe a droplet of fluid exuding from the cut surface of
twing. What is this fluid?
Show Answer


Q408) The translocation of organic solutes in sieve tube members is supported by Show Answer


Q409) Active transport Show Answer


Q410) Some cells are placed in a solution of glucose to measure the rate of diffusion. As the concentration of
glucose solution is being increased, the diffusion rate increases simultaneously. However, when the
concentration of glucose solution reaches above 10 m, the diffusion rate no longer increases
Which statement best define the mechanism of glucoses transport in the cells? Show Answer


Q411) Transport of different types of solute substances takes place by Show Answer


Q412) Phloem sap is made up of Show Answer


Q413) Which of the following affect the transport of molecules when carrier mediated facilitated diffusion is
involved? Show Answer


Q414) Who coined the term diffusion pressure deficit? Show Answer


Q415) Which one of the following does not play a major role in upward movement of xylem sap in tall trees? Show Answer


Q416) Why the rate of diffusion of a substance along the concentration gradient does not increase continuously,
while the concentration difference of the molecules across the membrane increases?
Show Answer


Q417) Which of them is/are correct regarding pressure flow model for translocation?
I. Sugar is transported through phloem as glucose
II. Movement of sugar is carried out through sieve tube near the source region
III. Concentration of sugar is always highest near the sink region
IV. Water from the adjacent xylem moves into phloem by osmosis Show Answer


Q418) After heavy rain fall with poor drainage, laves of many plants wilt due to
Show Answer


Q419) Graham’s law is correlated with Show Answer


Q420) Who proposed the ‘Cohesion Theory’ of ascent of sap? Show Answer


Q421) How would you differentiate between apoplast and symplast? Show Answer


Q422) Water potential of a solution is denoted by Show Answer


Q423) Which one of the following statements is wrong? Show Answer


Q424) Cell wall present in water conducting tissues, represented by swollen nodules, is known as Show Answer


Q425) Transport of organic solutes is supposed to take place by pressure flow hypothesis through phloem tissue
from source to sink. Choose the false statement about vascular tissue transport Show Answer


Q426) How much percentage of absorbed water in plants is used in the process of photosynthesis? Show Answer


Q427) The force responsible for upward conduction of water against gravity comes from Show Answer


Q428) Which of the following is not a purpose of transpiration? Show Answer


Q429) A soil sample is found to have 25% of its volume occupied by soil water. Of this, 10% is
hygroscopic water and the remaining is capillary water. What is the field capacity of this soil? Show Answer


Q430) Why is active transport considered important?
Show Answer


Q431) In mycorrhizal association, which one of the following increases the surface area available for absorption
of water and minerals by roots? Show Answer


Q432) Uphill transport is a type of Show Answer


Q433) Ascent of sap in plants was demonstrated by Show Answer


Q434) The value of pure water potential is Show Answer


Q435) Loss of water in liquid phase (in form of droplets) from the margin of leaves in many herbaceous plants is Show Answer


Q436) The relationship among different types of soil water can be summed up of the following equation: Show Answer


Q437) A cell dipped in 0.5 M sucrose solution has no effect but when the same will be dipped in 0.5 M
NaCl solution, the cell will Show Answer


Q438) Transpiration is manifestation of Show Answer


Q439) Two cells A and B are contiguous. Cell-A has osmotic pressure-10 atm, turgor pressure-7 atm and
diffusion pressure deficit-3 atm. Cell-B has osmotic pressure-8 atm, turgor pressure-3 atm and
diffusion pressure deficit 5 atm. The result will be Show Answer


Q440) Plasmolysis is the result of Show Answer


Q441) Stomata open and close due to Show Answer


Q442) Which one is incorrect statement? Show Answer


Q443) Which of the following is appropriate for mass-flow hypothesis?
Show Answer


Q444) The antitranspirant is
Show Answer


Q445) The rupture and fractionation do not usually occur in the water column in vessles/tracheids
during the ascent of sap because of Show Answer


Q446) The rate of diffusion of any substance is not affected by
Show Answer


Q447) Cohension and adhension theory, is otherwise called Show Answer


Q448) Stomata open due to accumulation of Show Answer


Q449) Which of the following in guard cell is responsible for opening of stomata?
Show Answer


Q450) Which of the following is the most accepted theory for movement of water through plants? Show Answer


Q451) The force responsible for the water movement against gravity even up to a 130 m of tall free comes from Show Answer


Q452) A leaf with more stomata on lower surface belongs to
Show Answer


Q453) When a plant cell is placed in pure water, it Show Answer


Q454) The loosely arranged non-chlorophyllous parenchyma cells present in lenticels, are called Show Answer


Q455) Select the wrong statement regarding membrane channels Show Answer


Q456) A group of students are studying transport of certain type of molecules in a cells and observe that
transport slows down when the cells are treated with poison, a chemical, which inhibit energy production.
Under normal conditions, the molecules are being studied and it is estimated that molecules probably
transported by
Show Answer


Q457) In symplast pathway of water movement, water passes from cell to cell, whose cytoplasm are connected through Show Answer


Q458) Select the correct statement Show Answer


Q459) Which ion helps in opening and closing of stomata?
Show Answer


Q460) Which theory is considered best to explain ascent of sap Show Answer


Q461) Which of the following get accumulated in the vacuoles of guard cells during stomatal opening? Show Answer


Q462) Transpiration is the manifestation of Show Answer


Q463) Which among the following has highest water potential? Show Answer


Q464) Stomatal opening is affected by
Show Answer


Q465) Stoma opens, when Show Answer


Q466) If solute particles are added in pure water, its diffusion pressure will be Show Answer


Q467) A red blood cell (RBC) was kept in a certain solution for few minutes and it got burst. The said
solution was Show Answer


Q468) The rate of transpiration will be very less in a situation where
Show Answer


Q469) The factor, most important in regulating transpiration, is Show Answer


Q470) Wooden doors and logs swells up, and get stuck up during rainy season due to
Show Answer


Q471) If water enters in a cell, the pressure exerted by its swollen protoplast is
Show Answer


Q472) What is the most efficient region of water absorption in roots? Show Answer


Q473) Regarding root pressure, which one is not correct? Show Answer


Q474) Choose the correct statements regarding guttation and pick the correct option from the codes given below
I. It occurs through specialised pore called hydathode
II. Hydathodes can be located on the margin and tips of leaves
III. It occurs in plants growing under condition of low soil moisture and high humidity
IV. It occurs in herbaceous plants when root pressure is low and transpiration is high Show Answer


Q475) What is the value of DPD? Show Answer


Q476) The transport of organic and inorganic substances in plants over longer distance occurs through vascular
tissue by the means of Show Answer


Q477) Choose the correct statement regarding casparian strips
I. It surrounds pericycle
II. It is made up of legnosuberin
III. It limits the pathway available to water solutes, forcing them to enter the symplast Show Answer


Q478) Translocation of organic materials in plants is explained Show Answer


Q479) Choose the correct option given below Show Answer


Q480) Movement of water through cell wall, is
Show Answer


Q481) Adhesion is caused by Show Answer


Q482) Short distance transport of substances like nutrients, water etc., in plants occur through Show Answer


Q483) With the increase in temperature, the process of imbibition Show Answer


Q484) In which form, does the food transported in plants? Show Answer


Q485) Identify the correct relationship with reference to water potential of a plant cell. Show Answer


Q486) The correct relationship among different type of soil water is Show Answer


Q487) In a fully turgid cell Show Answer


Q488) In which of the following plants, there will be no transpiration?
Show Answer


Q489) The value of osmotic potential of an electrolyte is always Show Answer


Q490) Carrier protein, which allows the movement of molecules in opposite direction is Show Answer


Q491) In osmosis, there is movement of Show Answer


Q492) If the osmotic pressure of cytoplasm in a cell is balanced by external solution, the solution must be Show Answer


Q493) In thistle funnel experiment, what will occur if sugar solution is added to beaker, after the process
of osmosis stops? Show Answer


Q494) Water rises in the stem due to Show Answer


Q495) Term osmosis is specifically used to refer Show Answer


Q496) Guttation is mainly due to Show Answer


Q497) Read the following statement carefully and choose the right answer from the codes given below
I. PMA and silicon oil of low viscosity are considered as antitranspirant
II. BAP, NAA and cobalt chloride is also used as antitranspirant
III. Abscisic acid affects the mechanism of opening and closing of stomata
IV. Starch of guard cells is converted into PEP ions by the process of hydrolysis
V. Potometer works on the principle of potential difference between the tip of the tube and that of plant
VI. Transpiration rate is directly proportional to the relative humidity Show Answer


Q498) When pea seeds and wheat grains are soaked in water, pea seeds showed more swelling than the
wheat. The reason is
Show Answer


Q499) The phytohormone, which increases the concentration of potassium in guard cells is also
responsible for the induction of Show Answer


Q500) Choose the correct option in accordance to the statements given above
I. The positive hydrostatic pressure is also called as turgor pressure
II. Wall pressure is exerted to prevent any increase in protoplasm size
III. Osmosis is the movement of substances, which takes place along a diffusion gradient
IV. Plasmolysis is the result of reverse osmosis Show Answer


Q501) Water channels are possessed by a membrane to facilitate the movement of hydrophilic substances. These
channels are made up of Show Answer


Q502) Who described mass flow hypothesis? Show Answer


Q503) Water can be absorbed from a hypertonic external solution by
Show Answer


Q504) In a fully turgid cell, …… is zero. Show Answer


Q505) Why the transport of organic food through phloem is bidirectional? Show Answer


Q506) Cohesion theory of water movement in plants was put forth by Show Answer


Q507) Choose the correct statements regarding the uptake of mineral nutrients and food in plants Show Answer


Q508) According to the transpiration-cohesion theory, the upward pull of water is transmitted to other water
molecules by cohesion, which is caused by
Show Answer


Q509) In plants, continuous water supply is due to Show Answer


Q510) Statement 1: Living plant cells do not bursts on keeping in water, while an animal cell like RBCs bursts
when kept in water
Statement 2: The rigidity of cell wall, plant cell maintain its shape and do not burst Show Answer


Q511) Statement 1: The optimum amount of water a soil can retained is known as its field capacity
Statement 2: Water in excess of field capacity percolate, to water table due to gravitation Show Answer


Q512) Statement 1: Cohesion force is also called as tensile strength
Statement 2: Attraction of water molecule to polar surface or hydrophilic wall of the xylem tube causes
adhesion force Show Answer


Q513) Statement 1: In phloem, sugars are translocated in non reducing form
Statement 2: Non-reducing sugars are most reactive sugars Show Answer


Q514) Statement 1: Unidirectional flow of water, mineral and nitrogen occurs through xylem
Statement 2: Direction of flow of organic and inorganic substances is unidirectional and occurs
through phloem Show Answer


Q515) Statement 1: During rainy season woodens doors get stuck and become difficult to open and shut
property
Statement 2: Due to the process of imbibition, volume of wooden items increases, when they come in contact of water Show Answer


Q516) Statement 1: When dried seeds of pea are placed in a tin and water added up to their upper
level and than a lid is put tightly over it. Within an hour, the lid will be blown off.
Statement 2: Due to rapid cell division in pea seeds.
Show Answer


Q517) Statement 1: Pure water is obtained by reverse osmosis from a solution through differentially
permeable membrane
Statement 2: Water obtained from reverse osmosis is devoid of impurities and is extra pure
Show Answer


Q518) Statement 1: In the ringing experiment, a narrow continuous band of tissues external to the xylem is
removed
Statement 2: Ringing experiment proves the transport of solutes by phloem Show Answer


Q519) Statement 1: Transpiration facilitate supply of water of photosynthesis, maintains shape and structure
of plant and also transports minerals from the soil to other parts of the plant
Statement 2: Process of transpiration helps in translocation of inorganic and sugar molecules from the
source to sink Show Answer


Q520) Statement 1: No energy expenditure takes place in the process of diffusion
Statement 2: Diffusion occurs along the concentration gradient, i.e, from a region of higher
concentration to a region of lower concentration Show Answer


Q521) Read the following statement and choose the correct one from the codes given below
I. The apoplastic movement of water takes place exclusively through intercellular spaces and cell wall
without crossing any membrane
II. Symplastic movement occurs from cell to cell through plasmodesmata, i.e., adjacent cells are connected
through plasmodesmata
III. Permeability of a membrane depends on its composition and chemical nature of the solute
IV. Solutes present in a cell increases the free energy of the water or water potential
Show Answer


Q522) Which of the following transport induces conformational changes in proteins?
Show Answer


Q523) Choose true and false statements from the following
I. Mycorrhizal association between fungus and root of plant (Pinus) is often obligate
II. Pinus and orchid seeds can germinate and grow into plant in absence of mycorrhizal association
III. Absorption of water along with mineral solute by root hairs is purely a process of diffusion
IV. In apoplast pathway, movement of water takes place through cell wall and intercellular spaces
V. Fungal hyphae provide sugar and organic internal to root
Choose the correct option Show Answer


Q524) Sunken stomata are usually found in the leaves of Show Answer


Q525) Examples of bulk flow by a positive hydrostatic pressure gradient and a negative hydrostatic pressure
gradient are Show Answer


Q526) If two types of seeds, like pea and maize are kept in water at the same time. Which among the two will
imbibe more water? Show Answer


Q527) Osmotic pressure is highest in which of the following plant type? Show Answer


Q528) The plants, which are able to send their roots up to the fringe of water table are called Show Answer