Practice Test

Q1) Plants absorbs water by Show Answer

Q2) Dry seeds when placed in water swell due to Show Answer

Q3) When a cell is fully turgid, which one of the following is zero ? Show Answer

Q4) Phenomenon of plasmolysis occurs when Show Answer

Q5) Which of the following statements is CORRECT ? Show Answer

Q6) The hydrolyc pressure developed inside the cell on the cell wall due to endosmosis is called Show Answer

Q7) The pressure on the plant cell walls due to the entry of water is called Show Answer

Q8) Which of the following is/are hydrophilic substances ? Show Answer

Q9) The movement of water from higher water potential to lower water potential through a semi permeable membrane is called Show Answer

Q10) _______ acts as an activator for enzyme nitrate reductase. Show Answer

Q11) Osmosis involves diffusion of Show Answer

Q12) The osmotic parameter determining the flow of water from one cell to another is Show Answer

Q13) 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

Q14) If a plant cell is immersed in water, the water continues to enter the cell until the Show Answer

Q15) "The cell wall is a permeable membrane" can be best deducted from the passage of water and minerals salts from Show Answer

Q16) An example of a selectively permeable membrane is Show Answer

Q17) Turgidity of the cell maintained by Show Answer

Q18) Plasma membrane controls Show Answer

Q19) DPD stands for Show Answer

Q20) All of the following event involve osmosis except Show Answer

Q21) The actual pressure with which water enters into the cell is called Show Answer

Q22) Selective permeability identifies the process of Show Answer

Q23) In plants, the semipermeable membrane allows the diffusion of Show Answer

Q24) Molecules move inside and outside living cells by Show Answer

Q25) The movement of solute particles from a region of higher concentration is termed as Show Answer

Q26) A cell is plasmolyzed after being kept in a hypertonic solution. What will be present between cell wall and plasmalemma ? Show Answer

Q27) Osmotic pressure in a vacuolated palnt cell is ususally Show Answer

Q28) In hypertonic solution, the water potential of a cell Show Answer

Q29) When a cell is fully turgid, which of the following will be zero ? Show Answer

Q30) Osmotic pressure is responsible for the turgidity of plant cells which Show Answer

Q31) DPD is equal to Show Answer

Q32) Uniformly sweet taste of a cup of tea is due to Show Answer

Q33) In pickles, spoilage is rare due to Show Answer

Q34) A cell placed in strong salt solution will shrink because Show Answer

Q35) Plant cells do not burst in distilled water because the cell wall is Show Answer

Q36) The magnitude of diffusion pressure deficit in non-turgid cell is equal to Show Answer

Q37) A plasmolyzed cell can be deplasmolyzed by placing it in Show Answer

Q38) Due to plasmolysis, the plant cell Show Answer

Q39) When water moves through a semipermeable membrane, then which of the following pressure develops ? Show Answer

Q40) Ina plant cell, the shrinking of protoplasm is called Show Answer

Q41) Wooden doors swell up and get stuck during the rainy season. This is due to the phenomenon of Show Answer

Q42) In plants, water moves from Show Answer

Q43) Movement of molecules of gases, liqiuds and solutes from a region of higher concentration to a region of lower concentration is called Show Answer

Q44) The lowest water potential in xylem is in the Show Answer

Q45) Purple cabbage leaves do not lose their colour in cold water but do so in boiling water because Show Answer

Q46) Plant cell kept in saline drop will Show Answer

Q47) A red blood cell was kept in certain solution for a few minutes and it got burst. The said solution was Show Answer

Q48) Which of the following is against concentration gradient ? Show Answer

Q49) During absorption of water by roots, the water potential of cell sap is lower than that of Show Answer

Q50) The movement of water from one cell of the cortex to the adjacent one in roots is due to Show Answer

Q51) Water potential in the leaf tissue is positive (+ve) during Show Answer

Q52) If a cell is reduced in size when placed in a solution, the solution is Show Answer

Q53) With decrease in turgidity of a cell surrounded by water, the wall pressure will Show Answer

Q54) What will be the nature of sugar solution if the cells of an epidermal peel of Rhoeo discolor shows plasmolysis ? Show Answer

Q55) Plant cells submerged in distilled water will become Show Answer

Q56) The water potential and osmotic potential of pure water is __________ respectively. Show Answer

Q57) Endosmosis of water occurs when in comparison with the outer solution, the water potential of cell sap is Show Answer

Q58) The restoration of turgidity in a plasmolyzed cell, when placed in a hypotonic solution is caused by Show Answer

Q59) To initiate plasmolysis in plant cells, the salt solution used is Show Answer

Q60) Diffusion pressure deficit of a fully turgid cell is equal to Show Answer

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

Q62) The term water potential was proposed by Show Answer

Q63) A thin slice of sugar beet placed in concentrated solution of NaCl would Show Answer

Q64) Risk of spoilage is less in salted pickles due to Show Answer

Q65) Which of the following can preserve food stuffs ? Show Answer

Q66) The initial stage or first step of water absorption by root cells is Show Answer

Q67) Three compartments of a cell are Show Answer

Q68) The unique property of water is Show Answer

Q69) If cells completely lack turgor pressure, they are said to be Show Answer

Q70) Water potential of an actively absorbing cell is Show Answer

Q71) Cell wall is permeable to Show Answer

Q72) How many regions are there in a typical root ? Show Answer

Q73) Cell wall of root hair is formed by which components ? Show Answer

Q74) Which property of cellulose and pectic compounds help root hairs to absorb water ? Show Answer

Q75) Plasma membrane is Show Answer

Q76) In apoplast pathway, how does the movement of water take place ? Show Answer

Q77) In symplast pathway, water travels through Show Answer

Q78) Which of the following is a rapid type of absorption ? Show Answer

Q79) Water will be absorbed by root hairs when the external medium is Show Answer

Q80) Root hairs occurs in the zone of Show Answer

Q81) 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

Q82) Absorption of water by a root is increased by Show Answer

Q83) Water will be absorbed by root hairs when Show Answer

Q84) In plants, maximum absorption of water takes place in the zone of Show Answer

Q85) The active transport of substances across the plasma membrane is done with the help of Show Answer

Q86) Many transplanted seedlings may not survive Show Answer

Q87) The roots of land plants can absorb water Show Answer

Q88) After heavy rainfall with poor drainage, leaves of many plants wilt due to Show Answer

Q89) Prolonged water-logging kills plants due to Show Answer

Q90) Rate of water absorption is slow near frrezing point because Show Answer

Q91) Water enters root hairs due to Show Answer

Q92) Outer layer of vacuole is called Show Answer

Q93) Movement of water in the cortex of root from outside to inside is due to Show Answer

Q94) For active absorption ________ is needed. Show Answer

Q95) The most widely accepted theory for ascent of sap in tree is Show Answer

Q96) Water in plants is transported by Show Answer

Q97) Cohesion-tension theory operates in Show Answer

Q98) Dixon and Jolly are associated with Show Answer

Q99) Water rises in the stem due to Show Answer

Q100) Cohesion theory is related to Show Answer

Q101) If cohesion-tension transpiration theory is correct, then break in water column in xylem vessels should Show Answer

Q102) Path of water movement from soil to xylem is Show Answer

Q103) A tree girdled upto xylem may survive for some time but ultimately dies because Show Answer

Q104) During cohesion theory, the upward pull of water from bottom to top by cohesion molecules is due to Show Answer

Q105) Ascent of sap in plants explains Show Answer

Q106) Dixon and Jolley's theory most satisfactorily illustrates the rate of ascent of sap on the basis of Show Answer

Q107) When the physical forces are taken into consideration to explain the ascent of sap in Dixon's theory, it includes Show Answer

Q108) Ascent of sap refers to the movement of water from Show Answer

Q109) Guard cells help in Show Answer

Q110) Transpiration is very important for plants because it helps in Show Answer

Q111) Which of the following is not a purpose of transpiration ? Show Answer

Q112) Stomatal opening and closing is due to Show Answer

Q113) The specialized epidermal cells surrounding guard cells are called Show Answer

Q114) The ultimate cause for the movement of water against gravity in a tree is Show Answer

Q115) Transpiration pull will be maximum under which of the following conditions ? Show Answer

Q116) Stomata open at night and close during day time in Show Answer

Q117) Transpiration occurs when the outer atmosphere Show Answer

Q118) Guard cells differ from epidermal cells as they have Show Answer

Q119) Stomatal opening is under the control of Show Answer

Q120) Maximum transpiration takes place from Show Answer

Q121) Stomata open during day time because the guard cells Show Answer

Q122) Transpiration occurs from Show Answer

Q123) In which of the following plants would metabolism be hindered if the leaves are coated with wax on their upper surface ? Show Answer

Q124) Absorption of water by root is increased with the Show Answer

Q125) Transpiration is high in Show Answer

Q126) Stomata opens when guard cells are Show Answer

Q127) A leaf twig of mesophytic plant dipped in water would demonstrate Show Answer

Q128) Transpiration is dependent upon Show Answer

Q129) The chlorphyllous cells which are fewer in number, unique in shape with thicker inner walls are known as Show Answer

Q130) Water lost through transpiration is Show Answer

Q131) The common characteristic between guard cells and mesophyll cells is Show Answer

Q132) Root pressure is maximum when Show Answer

Q133) Which of the following factors is most important in the regulation of transpiration ? Show Answer

Q134) Transpiration is least in Show Answer

Q135) Guard cells regulate Show Answer

Q136) Which does not cause stomatal opening ? Show Answer

Q137) A twig kept in water having some salt remains fresh for longer period due to Show Answer

Q138) Stomata generally operate in response to Show Answer

Q139) Stomata open in daytime due to Show Answer

Q140) Epidermal cells containing chloroplasts are Show Answer

Q141) Each stoma is surrounded by Show Answer

Q142) Main function of lenticle is Show Answer

Q143) In which of the following groups is stomata absent ? Show Answer

Q144) In plants, the process of transpiration helps in Show Answer

Q145) Stomata closes due to __________ in guard cells. 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) In vascular tissue which is the main conducting element ? Show Answer

Q155) how many elements are essential elements ? Show Answer

Q156) Generally, chemical analysis of plant shows the presence of _________ different elements. Show Answer

Q157) Which of the following is not a micronutrient ? Show Answer

Q158) Which of the following is a macronutrient ? Show Answer

Q159) Plants require sulphur for Show Answer

Q160) Transport of food materials in higher plants takes place through Show Answer

Q161) Water potential can be determined by Show Answer