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

Q5) When a cell is fully turgid, which one of the following is zero ? Show Answer

Q6) Phenomenon of plasmolysis occurs when Show Answer

Q7) Which of the following statements is CORRECT ? Show Answer

Q8) The hydraulic pressure developed inside the cell on the cell wall due to endosmosis is called Show Answer

Q9) The pressure on the plant cell walls due to the entry of water is called Show Answer

Q10) Which of the following is/are hydrophilic substances ? Show Answer

Q11) Hydroponics is the process of growing plants in Show Answer

Q12) The movement of water from higher water potential to lower water potential through a semi permeable membrane is called Show Answer

Q13) _______ acts as an activator for enzyme nitrate reductase. Show Answer

Q14) Osmosis involves diffusion of Show Answer

Q15) The osmotic parameter determining the flow of water from one cell to another is Show Answer

Q16) 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

Q17) If a plant cell is immersed in water, the water continues to enter the cell until the Show Answer

Q18) "The cell wall is a permeable membrane" can be best deducted from the passage of water and minerals salts from Show Answer

Q19) An example of a selectively permeable membrane is Show Answer

Q20) Turgidity of the cell maintained by Show Answer

Q21) Plasma membrane controls Show Answer

Q22) DPD stands for Show Answer

Q23) All of the following event involve osmosis except Show Answer

Q24) The actual pressure with which water enters into the cell is called Show Answer

Q25) Selective permeability identifies the process of Show Answer

Q26) In plants, the semipermeable membrane allows the diffusion of Show Answer

Q27) Molecules move inside and outside living cells by Show Answer

Q28) The movement of solute particles from a region of higher concentration is termed as Show Answer

Q29) A cell is plasmolyzed after being kept in a hypertonic solution. What will be present between cell wall and plasmalemma ? Show Answer

Q30) Osmotic pressure in a vacuolated plant cell is usually Show Answer

Q31) In hypertonic solution, the water potential of a cell Show Answer

Q32) When a cell is fully turgid, which of the following will be zero ? Show Answer

Q33) Osmotic pressure is responsible for the turgidity of plant cells which Show Answer

Q34) DPD is equal to Show Answer

Q35) Uniformly sweet taste of a cup of tea is due to Show Answer

Q36) A cell placed in strong salt solution will shrink because Show Answer

Q37) Plant cells do not burst in distilled water because the cell wall is Show Answer

Q38) The magnitude of diffusion pressure deficit in non-turgid cell is equal to Show Answer

Q39) A plasmolyzed cell can be deplasmolyzed by placing it in Show Answer

Q40) Due to plasmolysis, the plant cell Show Answer

Q41) When water moves through a semipermeable membrane, then which of the following pressure develops ? Show Answer

Q42) Ina plant cell, the shrinking of protoplasm is called Show Answer

Q43) Wooden doors swell up and get stuck during the rainy season. This is due to the phenomenon of Show Answer

Q44) In plants, water moves from Show Answer

Q45) Movement of molecules of gases, liqiuds and solutes from a region of higher concentration to a region of lower concentration is called Show Answer

Q46) The lowest water potential in xylem is in the Show Answer

Q47) Purple cabbage leaves do not lose their colour in cold water but do so in boiling water because Show Answer

Q48) Plant cell kept in saline drop will Show Answer

Q49) A red blood cell was kept in certain solution for a few minutes and it got burst. The said solution was Show Answer

Q50) Which of the following is against concentration gradient ? Show Answer

Q51) During absorption of water by roots, the water potential of cell sap is lower than that of Show Answer

Q52) The movement of water from one cell of the cortex to the adjacent one in roots is due to Show Answer

Q53) Water potential in the leaf tissue is positive (+ve) during Show Answer

Q54) If a cell is reduced in size when placed in a solution, the solution is Show Answer

Q55) With decrease in turgidity of a cell surrounded by water, the wall pressure will Show Answer

Q56) What will be the nature of sugar solution if the cells of an epidermal peel of Rhoeo discolor shows plasmolysis ? Show Answer

Q57) Plant cells submerged in distilled water will become Show Answer

Q58) Endosmosis of water occurs when in comparison with the outer solution, the water potential of cell sap is Show Answer

Q59) The restoration of turgidity in a plasmolyzed cell, when placed in a hypotonic solution is caused by Show Answer

Q60) To initiate plasmolysis in plant cells, the salt solution used is Show Answer

Q61) Which one is a unit of measurement of water potential ? Show Answer

Q62) A thin slice of sugar beet placed in concentrated solution of NaCl would Show Answer

Q63) Risk of spoilage is less in salted pickles due to Show Answer

Q64) Which of the following can preserve food stuffs ? Show Answer

Q65) The initial stage or first step of water absorption by root cells is Show Answer

Q66) Three compartments of a cell are Show Answer

Q67) The unique property of water is Show Answer

Q68) If cells completely lack turgor pressure, they are said to be Show Answer

Q69) Water potential of an actively absorbing cell is Show Answer

Q70) Cell wall is permeable to Show Answer

Q71) How many regions are there in a typical root ? Show Answer

Q72) Cell wall of root hair is formed by which components ? Show Answer

Q73) Which property of cellulose and pectic compounds help root hairs to absorb water ? Show Answer

Q74) Plasma membrane is Show Answer

Q75) In apoplast pathway, how does the movement of water take place ? Show Answer

Q76) In symplast pathway, water travels through Show Answer

Q77) Which of the following is a rapid type of absorption ? Show Answer

Q78) Water will be absorbed by root hairs when the external medium is Show Answer

Q79) Root hairs occurs in the zone of Show Answer

Q80) Absorption of water by a root is increased by Show Answer

Q81) Water will be absorbed by root hairs when Show Answer

Q82) In plants, maximum absorption of water takes place in the zone of Show Answer

Q83) The active transport of substances across the plasma membrane is done with the help of Show Answer

Q84) Many transplanted seedlings may not survive Show Answer

Q85) The roots of land plants can absorb water Show Answer

Q86) After heavy rainfall with poor drainage, leaves of many plants wilt due to Show Answer

Q87) Water enters root hairs due to Show Answer

Q88) In absorption of water, the root cap has no significant role because Show Answer

Q89) Outer layer of vacuole is called Show Answer

Q90) Movement of water in the cortex of root from outside to inside is due to Show Answer

Q91) For active absorption ________ is needed. Show Answer

Q92) Attraction between water molecule is due to Show Answer

Q93) The most widely accepted theory for ascent of sap in tree is Show Answer

Q94) 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

Q95) Water in plants is transported by Show Answer

Q96) Cohesion-tension theory operates in Show Answer

Q97) Cohesion theory is related to Show Answer

Q98) If cohesion-tension transpiration theory is correct, then break in water column in xylem vessels should Show Answer

Q99) Which of the following plants is ideal to demonstrate ascent of sap ? Show Answer

Q100) Path of water movement from soil to xylem is Show Answer

Q101) A tree girdled upto xylem may survive for some time but ultimately dies because Show Answer

Q102) During cohesion theory, the upward pull of water from bottom to top by cohesion molecules is due to Show Answer

Q103) Attraction force of cell walls for water molecules is termed as Show Answer

Q104) Ascent of sap in plants explains Show Answer

Q105) Ascent of sap refers to the movement of water from Show Answer

Q106) Transpiration is very important for plants because it helps in Show Answer

Q107) Stomatal opening and closing is due to Show Answer

Q108) The specialized epidermal cells surrounding guard cells are called Show Answer

Q109) The ultimate cause for the movement of water against gravity in a tree is Show Answer

Q110) Transpiration pull will be maximum under which of the following conditions ? Show Answer

Q111) Stomata open at night and close during day time in Show Answer

Q112) Transpiration occurs when the outer atmosphere Show Answer

Q113) Guard cells differ from epidermal cells as they have Show Answer

Q114) Stomatal opening is under the control of Show Answer

Q115) Maximum transpiration takes place from Show Answer

Q116) Stomata open during day time because the guard cells Show Answer

Q117) Transpiration occurs from Show Answer

Q118) In which of the following plants would metabolism be hindered if the leaves are coated with wax on their upper surface ? Show Answer

Q119) What percentage of water absorbed by herbaceous plants is lost in transpiration ? Show Answer

Q120) Absorption of water by root is increased with the Show Answer

Q121) Transpiration is high in Show Answer

Q122) Of the processes which occur in leaves, the one which may lower their temperature (cooling effect) is Show Answer

Q123) Stomata opens when guard cells are Show Answer

Q124) A leaf twig of mesophytic plant dipped in water would demonstrate Show Answer

Q125) Which is not related to transpiration ? Show Answer

Q126) Transpiration is dependent upon Show Answer

Q127) The chlorphyllous cells which are fewer in number, unique in shape with thicker inner walls are known as Show Answer

Q128) Water lost through transpiration is Show Answer

Q129) The common characteristic between guard cells and mesophyll cells is Show Answer

Q130) Root pressure is maximum when Show Answer

Q131) Wilting appears due to excessive Show Answer

Q132) Which of the following factors is most important in the regulation of transpiration ? Show Answer

Q133) Transpiration is least in Show Answer

Q134) Guard cells regulate Show Answer

Q135) Which does not cause stomatal opening ? Show Answer

Q136) Stomata generally operate in response to Show Answer

Q137) Stomata open in daytime due to Show Answer

Q138) Epidermal cells containing chloroplasts are Show Answer

Q139) Each stoma is surrounded by Show Answer

Q140) Main function of lenticle is Show Answer

Q141) In which of the following groups is stomata absent ? Show Answer

Q142) "Transpiration is a necessary evil", this sentence was given by Show Answer

Q143) In plants, the process of transpiration helps in Show Answer

Q144) Stomata closes due to __________ in guard cells. Show Answer

Q145) Last step in stomatal transpiration is Show Answer

Q146) Which of the following is not possible in plants without transpiration ? Show Answer

Q147) The rate of transpiration is highest in the Show Answer

Q148) __________ is the chief constituent of protoplasm. Show Answer

Q149) Water acts as a ____________ in cell. Show Answer

Q150) Which property of water makes it a temperature stabilizer ? Show Answer

Q151) The direction of movement of food in pholem is Show Answer

Q152) Translocation of food takes place through Show Answer

Q153) Which one of following structures between two adjacent cells is acting as an effective transport pathway ? Show Answer

Q154) Carbohydrates are stored in plants in the form of Show Answer

Q155) In vascular tissue which is the main conducting element ? Show Answer

Q156) how many elements are essential elements ? Show Answer

Q157) Generally, chemical analysis of plant shows the presence of _________ different elements. Show Answer

Q158) Which of the following is not a micronutrient ? Show Answer

Q159) Which of the following is a macronutrient ? Show Answer

Q160) Plants require sulphur for Show Answer

Q161) Non -mineral elements are Show Answer

Q162) Growth of plants in soil less aqueous medium is known as Show Answer

Q163) Macronutrients are the nutrients required in Show Answer

Q164) Which pigment is essential for photosynthesis ? Show Answer

Q165) Deficiency of calcium causes Show Answer

Q166) In passive absorption, by which process does movement of mineral ions take place ? Show Answer

Q167) Respiratory inhibitor _________ the rate of mineral absorption. Show Answer

Q168) Which mineral deficiency causes stunted growth ? Show Answer

Q169) If oxygen content in the medium is less, then the rate of mineral absorption Show Answer

Q170) Minerals are absorbed in the form of Show Answer

Q171) Calcium is present in plants in the form of Show Answer

Q172) By which two methods does absorption of mineral ion takes place ? Show Answer

Q173) In active absorption which energy is required ? Show Answer

Q174) Calcium helps to Show Answer

Q175) Cell wall becomes __________ due to the lack of calcium. Show Answer

Q176) Which is produced during water stress that brings stomatal closure ? Show Answer

Q177) Which is the most important factor in regulation of transpiration ? Show Answer

Q178) Stomata open or close due to the ion Show Answer

Q179) Which of the following do not show transpiration ? Show Answer

Q180) Stomata opens due to Show Answer

Q181) How many elements are universally present in plants ? Show Answer

Q182) _________ is constituent of all amino acids. Show Answer

Q183) Which coenzymes are required in photosynthesis ? Show Answer

Q184) phosphorus is absorbed from the soil in the form of Show Answer

Q185) Which mineral is involved in the transfer of electron to PSII during non-cyclic photophosphorylation ? Show Answer

Q186) 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

Q187) 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

Q188) 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

Q189) 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

Q190) 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

Q191) A higher plant cell impregnated with cutin and suberin is palced in water. What would happen after 15 minutes ? Show Answer

Q192) 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

Q193) 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

Q194) The conditions under which transpiration would be most rapid are Show Answer

Q195) Transport of food materials in higher plants takes place through Show Answer

Q196) Water potential can be determined by Show Answer

Q197) What are the aquaporins in facilitated diffusion process? Show Answer

Q198) When sugars enter sieve tubes, water flows by osmosis, resulting in Show Answer

Q199) The evaporative loss of water from the exposed part of plant is called Show Answer

Q200) Which one of the following is not related to guttation?
Show Answer

Q201) Whose water potential is less than water potential of root hair during the water absorption by
root hair? Show Answer

Q202) A thin film of water is held by the soil particles under the influence of internal attractive force. It
is called Show Answer

Q203) 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

Q204) What is required for the transport of substances through a membrane from a region of lower
concentration to higher concentration? Show Answer

Q205) Which of the following statement is correct? Show Answer

Q206) 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

Q207) Which one of the following is the reason for higher rate of transpiration in Sorghum as compared
to maize? Show Answer

Q208) If turgidity of a cell surrounded by water increases, the wall pressure will
Show Answer

Q209) In plants; which of the following are/is translocated through phloem? Show Answer

Q210) Root pressure is due to Show Answer

Q211) 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

Q212) Stomatal opening is regulated by Show Answer

Q213) The direction of movement in phloem is …A… and that of xylem is …B… . Choose the correct pair of options

Show Answer

Q214) The potential energy of water is referred as Show Answer

Q215) If two solutions have the same osmoregularity, they are said to be Show Answer

Q216) Plant obtain carbon and most of their oxygen from Show Answer

Q217) When plant cell is kept in saline drip, cell
Show Answer

Q218) Carrier protein, which allows the diffusion of two type of molecules in the same direction is Show Answer

Q219) Hydroponics is the method of Show Answer

Q220) 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

Q221) 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

Q222) Loss of liquid water by guttation occurs through
Show Answer

Q223) The process by which water is absorbed by solids like colloid causing them to increase in volume,
is called Show Answer

Q224) How will you distinguish between the method of transport between xylem and phloem? Show Answer

Q225) In plasmolysed cell, the space between nucleus and plasma membrane is occupied by
Show Answer

Q226) The sugarcane plant has
Show Answer

Q227) Water potential and osmotic potential of pure water is Show Answer

Q228) When pea seeds and wheat seeds are put in water, which of the two will imbibe more water? Show Answer

Q229) Nyctinasty and seismonasty in plants like bean and touch me not are produced due to Show Answer

Q230) 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

Q231) Choose the false statement Show Answer

Q232) Sunken stomata is found in the leaves of Show Answer

Q233) Who proposed cohesion theory of water movement in plants? Show Answer

Q234) 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

Q235) Direction of translocation of organic food or solutes, is
Show Answer

Q236) The water available to plants for absorption is
Show Answer

Q237) Why all the minerals present in soil can not be passively absorbed by roots? Show Answer

Q238) Which one is not the job of zone of cell differentiation in roots? Show Answer

Q239) which one is against the theory of ascent of sap given by Dixon and Jolly? Show Answer

Q240) Attraction of water molecules to polar surfaces is known as Show Answer

Q241) The epidermal trichomes help in Show Answer

Q242) In land plants, the guard cells differ from other epidermal cells in having Show Answer

Q243) 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

Q244) Water potential increases due to Show Answer

Q245) Why seeds imbibe and swell after keeping in water? Show Answer

Q246) If you are given a task to analyse phloem sap chemical, which of the following will be present in least
concentration? Show Answer

Q247) Some elements like calcium are not remobilised because they are Show Answer

Q248) 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

Q249) In plants, water supply is due to Show Answer

Q250) Which part of root absorbs both water and minerals? Show Answer

Q251) Diffusion pressure deficit is also called Show Answer

Q252) Diffusion, a process occur(s) along the concentration gradient is actively involved in Show Answer

Q253) Which of the following mechanism can explain the transport of sucrose from source to sink? Show Answer

Q254) Which of the following cells are not related to the structure of stomata?
Show Answer

Q255) Water lost in Guttation is Show Answer

Q256) The approximate length of root hair zone in plants
Show Answer

Q257) When the conditions are dry, a grass leaf curls inward to minimize water loss due to the pressure
of Show Answer

Q258) Transpiration is measured by Show Answer

Q259) A cell swells up when kept in
Show Answer

Q260) 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

Q261) When a plasmolyzed cell is placed in a hypotonic solution then water will move inside the cell.
Which force causes this? Show Answer

Q262) Which one of the following denotes the water potential of the mesophyll cell in wilted condition? Show Answer

Q263) Sugar stored in roots may be mobilised to become a source of food in the Show Answer

Q264) Which of the following is the unit of measurement of water potential? Show Answer

Q265) Which type of water is used by the plants? Show Answer

Q266) Water in the vessel of xylem in tall plant is
Show Answer

Q267) 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

Q268) Stomata which can open at night, are present in Show Answer

Q269) This hormone affects opening and closing of stomata.
Show Answer

Q270) Transport of gases, hormones, photosynthetase and organic solutes in plants is Show Answer

Q271) Which statement can be shared by facilitated diffusion and active transport? Show Answer

Q272) Which of the following has maximum water potential? Show Answer

Q273) In plants, long distance transport of organic and inorganic substances occur through Show Answer

Q274) Xylem sap is made up of Show Answer

Q275) Passive absorption of mineral salts is not dependent on Show Answer

Q276) The pressure exerted by the protoplast due to the entry of water against the rigid cell wall is termed as Show Answer

Q277) Some statements are given regarding the active transport in plants. Choose the incorrect statement Show Answer

Q278) Root endodermis has the ability to actively transport ions …A… because of …B… .
Choose the correct pair Show Answer

Q279) The shape of guard cells in stomata in sugarcane plant is Show Answer

Q280) Plants develops force for upward conduction of water against gravity is derived from Show Answer

Q281) How translocation of organic material is explained in plants? Show Answer

Q282) 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

Q283) Which one of the following acts as a barrier in a apoplastic pathway?
Show Answer

Q284) 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
IV. Ammophila Dicot Curl their leaves to minimise
loss of water
V. Tribulus Ephemeral Water is stored in stem Show Answer

Q285) Which pathway applies least resistance to the movement of water? Show Answer

Q286) During flowering, fruit ripening and development period in plants, which part of the plant act as source? Show Answer

Q287) Plants growing on hills are likely to show Show Answer

Q288) The transport of ions up the stem to all parts is through Show Answer

Q289) How much of absorbed water is lost during transpiration in a plant? Show Answer

Q290) Which one of the following is part of symplast? Show Answer

Q291) The real forces responsible for the movement of water from one cell to another cell is mainly Show Answer

Q292) Water occur freely in previous rocks and deep in soil above the impermeable strata is Show Answer

Q293) A twig kept in water having some salt remains fresh for longer period due to
Show Answer

Q294) If stem of plant is cut under a state of tension in xylem sap, what will be the result? Show Answer

Q295) One factor responsible for water rise up to 100 m of tall plant, is Show Answer

Q296) 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

Q297) Tension, one of the important factor in the movement of xylem sap in a tree is a result of Show Answer

Q298) What is the approximate dry weight contained by majority of herbaceous plants Show Answer

Q299) Root hair absorb water from the soil on account of Show Answer

Q300) 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

Q301) The first process by which water enters into the seed coat when a seed is placed in suitable
environment for germination is
Show Answer

Q302) In tall plants, because of which factor, continuous water column extends upward? Show Answer

Q303) What will happen, if a large amount of water enters in a plant cell? Show Answer

Q304) 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
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

Q305) Opening of stomata is not affected by Show Answer

Q306) Osmosis involves flow of Show Answer

Q307) Cohesion force, a feature of cohesion theory is also called Show Answer

Q308) A plant cell becomes turgid due to Show Answer

Q309) Which of the following experiments is called physiological demonstration of osmosis? Show Answer

Q310) Which of the following statements is/are true?
I.The apoplastic movement of water occurs exclusively through the cell wall without crossing any
II.Solutes present in a cell (or in any solution) increase the free energy of water or water
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

Q311) Which of the following maintains the shape of cell? Show Answer

Q312) 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
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

Q313) Root hair absorbs water from soil through Show Answer

Q314) Which type of soil has least water retaining capacity?
Show Answer

Q315) Phloem sap is mainly ….. and ….. . Choose the correct pair of options?
Show Answer

Q316) Passive absorption of water by the root system is the result of Show Answer

Q317) The rate if diffusion is dependent upon the permeability of the medium, it however Show Answer

Q318) If flowers are cut and dipped in dilute NaCl solution, then Show Answer

Q319) Munch hypothesis is based on Show Answer

Q320) Transpiration facilitates Show Answer

Q321) Which of the following is not correct regarding carrier molecules, involved in facilitated diffusion?
Show Answer

Q322) Which of the following is used as an antitranspirant? Show Answer

Q323) 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

Q324) 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

Q325) Which of the following lacks stomata?
Show Answer

Q326) Guard cells control Show Answer

Q327) Wilting occurs when Show Answer

Q328) Which among the following represents the correct relationship for a plasmolysed cell? Show Answer

Q329) Water in the soil available to plants is Show Answer

Q330) The magnitude of root pressure ranges between Show Answer

Q331) 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

Q332) 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

Q333) When a cell is plasmolysed, it becomes Show Answer

Q334) Water is lost in a liquid state in some plants through hydathodes. These hydathodes Show Answer

Q335) 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

Q336) Which type of transpiration continues throughout day and night?
Show Answer

Q337) 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

Q338) 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
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

Q339) Water composition in a water-melon is approximately Show Answer

Q340) The membrane, which allows passage of certain substances more readily than others is termed as Show Answer

Q341) Which one of the following is not a part of symplast?
Show Answer

Q342) What is mandatory in the process of facilitated diffusion? Show Answer

Q343) A special type, which occurs when water is absorbed by solids causing them to increase in volume is called Show Answer

Q344) Which of the following does not affect water potential of water? Show Answer

Q345) 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

Q346) 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

Q347) Path of water movement from soil to xylem is
Show Answer

Q348) The stomata in CAM plants open during
Show Answer

Q349) What will be the affect of accumulation of potassium ions in guard cells? Show Answer

Q350) Through which process, starch of the guard cell is converted into PEP ions? Show Answer

Q351) Which one of the following does not help in molecular transport? Show Answer

Q352) Ascent of sap is Show Answer

Q353) Passage cells are thin-walled cells found in Show Answer

Q354) The term apoplast signifies Show Answer

Q355) 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

Q356) Osmotic pressure of a solution is
Show Answer

Q357) Potometer works on the principle of Show Answer

Q358) In which of the following path, flow of water occurs from cell to cell through their protoplasm? Show Answer

Q359) Transport of minerals through xylem is
Show Answer

Q360) Mechanism of opening and closing of stomata is controlled by
Show Answer

Q361) Stomata are also called as
Show Answer

Q362) What happens when concentration of solutes decreases in guard cells? Show Answer

Q363) During water absorption from the soil, the water potential of the root cell is…..than the soil Show Answer

Q364) Water potential gradient can be best defined as Show Answer

Q365) Humidity in atmosphere decreases rate of Show Answer

Q366) Guard cells help in Show Answer

Q367) Both minerals and water are absorbed by Show Answer

Q368) 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

Q369) Which of the following pair is selective and specific mode of transport? Show Answer

Q370) 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

Q371) Which one is true about guttation? Show Answer

Q372) What are the location of casparian strips-which interrupts the movement of water inside a root? Show Answer

Q373) Select the correct statement from the following Show Answer

Q374) Which one of the following doesn’t help in molecule transport? Show Answer

Q375) What type of material do not diffuse or find it difficult to pass through the membranes? Show Answer

Q376) When the concentration of the soil solutes is low, the absorption of water Show Answer

Q377) If sugars are actively moving into a cell, what will happens to the turgor pressure of the cell? Show Answer

Q378) Read the following statements and choose the correct answer from the options given below Show Answer

Q379) Movement among cells against concentration gradient is called Show Answer

Q380) 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

Q381) 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

Q382) Choose, true and false statements from the following and select the correct option from the set (a-d) given
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
IV. In diffusion, molecules move against concentration gradient in a random manner
V. Facilitated diffusion is faster than active transport Show Answer

Q383) Which one of the following is the most accepted theory of ascent of sap? Show Answer

Q384) 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

Q385) Unloading of minerals occur at Show Answer

Q386) Why the tropical deciduous forest trees shed their leaves? Show Answer

Q387) Which of the following affects the rate of diffusion? Show Answer

Q388) 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

Q389) The translocation of organic solutes in sieve tube members is supported by Show Answer

Q390) Active transport Show Answer

Q391) 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

Q392) Transport of different types of solute substances takes place by Show Answer

Q393) Phloem sap is made up of Show Answer

Q394) Which of the following affect the transport of molecules when carrier mediated facilitated diffusion is
involved? Show Answer

Q395) Which one of the following does not play a major role in upward movement of xylem sap in tall trees? Show Answer

Q396) 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

Q397) 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

Q398) After heavy rain fall with poor drainage, laves of many plants wilt due to
Show Answer

Q399) Graham’s law is correlated with Show Answer

Q400) Who proposed the ‘Cohesion Theory’ of ascent of sap? Show Answer

Q401) How would you differentiate between apoplast and symplast? Show Answer

Q402) Water potential of a solution is denoted by Show Answer

Q403) Which one of the following statements is wrong? Show Answer

Q404) Cell wall present in water conducting tissues, represented by swollen nodules, is known as Show Answer

Q405) 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

Q406) How much percentage of absorbed water in plants is used in the process of photosynthesis? Show Answer

Q407) The force responsible for upward conduction of water against gravity comes from Show Answer

Q408) Which of the following is not a purpose of transpiration? Show Answer

Q409) 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

Q410) Why is active transport considered important?
Show Answer

Q411) In mycorrhizal association, which one of the following increases the surface area available for absorption
of water and minerals by roots? Show Answer

Q412) Uphill transport is a type of Show Answer

Q413) Ascent of sap in plants was demonstrated by Show Answer

Q414) The value of pure water potential is Show Answer

Q415) Loss of water in liquid phase (in form of droplets) from the margin of leaves in many herbaceous plants is Show Answer

Q416) The relationship among different types of soil water can be summed up of the following equation: Show Answer

Q417) 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

Q418) Transpiration is manifestation of Show Answer

Q419) 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

Q420) Plasmolysis is the result of Show Answer

Q421) Stomata open and close due to Show Answer

Q422) Which one is incorrect statement? Show Answer

Q423) Which of the following is appropriate for mass-flow hypothesis?
Show Answer

Q424) The rupture and fractionation do not usually occur in the water column in vessles/tracheids
during the ascent of sap because of Show Answer

Q425) The rate of diffusion of any substance is not affected by
Show Answer

Q426) Stomata open due to accumulation of Show Answer

Q427) Which of the following in guard cell is responsible for opening of stomata?
Show Answer

Q428) Which of the following is the most accepted theory for movement of water through plants? Show Answer

Q429) The force responsible for the water movement against gravity even up to a 130 m of tall free comes from Show Answer

Q430) A leaf with more stomata on lower surface belongs to
Show Answer

Q431) When a plant cell is placed in pure water, it Show Answer

Q432) Select the wrong statement regarding membrane channels Show Answer

Q433) 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

Q434) In symplast pathway of water movement, water passes from cell to cell, whose cytoplasm are connected through Show Answer

Q435) Select the correct statement Show Answer

Q436) Which ion helps in opening and closing of stomata?
Show Answer

Q437) Which theory is considered best to explain ascent of sap Show Answer

Q438) Which of the following get accumulated in the vacuoles of guard cells during stomatal opening? Show Answer

Q439) Transpiration is the manifestation of Show Answer

Q440) Which among the following has highest water potential? Show Answer

Q441) Stomatal opening is affected by
Show Answer

Q442) Stoma opens, when Show Answer

Q443) If solute particles are added in pure water, its diffusion pressure will be Show Answer

Q444) A red blood cell (RBC) was kept in a certain solution for few minutes and it got burst. The said
solution was Show Answer

Q445) The rate of transpiration will be very less in a situation where
Show Answer

Q446) The factor, most important in regulating transpiration, is Show Answer

Q447) Wooden doors and logs swells up, and get stuck up during rainy season due to
Show Answer

Q448) If water enters in a cell, the pressure exerted by its swollen protoplast is
Show Answer

Q449) What is the most efficient region of water absorption in roots? Show Answer

Q450) Regarding root pressure, which one is not correct? Show Answer

Q451) 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

Q452) The transport of organic and inorganic substances in plants over longer distance occurs through vascular
tissue by the means of Show Answer

Q453) 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

Q454) Translocation of organic materials in plants is explained Show Answer

Q455) Choose the correct option given below Show Answer

Q456) Movement of water through cell wall, is
Show Answer

Q457) Adhesion is caused by Show Answer

Q458) Short distance transport of substances like nutrients, water etc., in plants occur through Show Answer

Q459) With the increase in temperature, the process of imbibition Show Answer

Q460) In which form, does the food transported in plants? Show Answer

Q461) Identify the correct relationship with reference to water potential of a plant cell. Show Answer

Q462) The correct relationship among different type of soil water is Show Answer

Q463) In a fully turgid cell Show Answer

Q464) In which of the following plants, there will be no transpiration?
Show Answer

Q465) The value of osmotic potential of an electrolyte is always Show Answer

Q466) Carrier protein, which allows the movement of molecules in opposite direction is Show Answer

Q467) In osmosis, there is movement of Show Answer

Q468) If the osmotic pressure of cytoplasm in a cell is balanced by external solution, the solution must be Show Answer

Q469) In thistle funnel experiment, what will occur if sugar solution is added to beaker, after the process
of osmosis stops? Show Answer

Q470) Water rises in the stem due to Show Answer

Q471) Term osmosis is specifically used to refer Show Answer

Q472) Guttation is mainly due to Show Answer

Q473) 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

Q474) When pea seeds and wheat grains are soaked in water, pea seeds showed more swelling than the
wheat. The reason is
Show Answer

Q475) The phytohormone, which increases the concentration of potassium in guard cells is also
responsible for the induction of Show Answer

Q476) 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

Q477) Water channels are possessed by a membrane to facilitate the movement of hydrophilic substances. These
channels are made up of Show Answer

Q478) Who described mass flow hypothesis? Show Answer

Q479) Water can be absorbed from a hypertonic external solution by
Show Answer

Q480) In a fully turgid cell, …… is zero. Show Answer

Q481) Why the transport of organic food through phloem is bidirectional? Show Answer

Q482) Cohesion theory of water movement in plants was put forth by Show Answer

Q483) Choose the correct statements regarding the uptake of mineral nutrients and food in plants Show Answer

Q484) 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

Q485) In plants, continuous water supply is due to Show Answer

Q486) 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

Q487) 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

Q488) 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

Q489) Statement 1: In phloem, sugars are translocated in non reducing form
Statement 2: Non-reducing sugars are most reactive sugars Show Answer

Q490) 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

Q491) Statement 1: During rainy season woodens doors get stuck and become difficult to open and shut
Statement 2: Due to the process of imbibition, volume of wooden items increases, when they come in contact of water Show Answer

Q492) 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

Q493) 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

Q494) 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

Q495) 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

Q496) 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

Q497) Which of the following transport induces conformational changes in proteins?
Show Answer

Q498) 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

Q499) Sunken stomata are usually found in the leaves of Show Answer

Q500) Examples of bulk flow by a positive hydrostatic pressure gradient and a negative hydrostatic pressure
gradient are Show Answer

Q501) 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

Q502) The plants, which are able to send their roots up to the fringe of water table are called Show Answer