Transport in Plants Set 3

All India Pre Medical Test (AIPMT)

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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Transport in Plants Set 3

Q1 | Raisins placed in water swell up due to (CPMT 1988, KCET 2008)
  • Plasmolysi
  • Adsorption
  • Diffusio
  • Endo osmosis
Answer: Diffusio
Q2 | Root hairs absorb water from soil when (AFMC 1988, JIPMER 1986)
  • Osmotic concentration is same in the two
  • Solute concentration is higher in soil solution
  • Solute concentration is higher in root hairs
  • Absorption is active
Answer: Absorption is active
Q3 | A cell placed in strong salt solution will shrink because (JIPMER 1986)
  • Cytoplasm will decompose
  • Mineral salts will break the cell wall
  • Salt water enters the cell
  • Water comes out by exoosmosis
Answer: Cytoplasm will decompose
Q4 | Osmosis defined as
  • Flow of solvent (water) through a semipermiable membrane from less concentrated solution to more concentrated solution.
  • Flow of solute from a semipermeable membrane
  • Flow of water without a membrane
  • None ot the above
Answer: Flow of solvent (water) through a semipermiable membrane from less concentrated solution to more concentrated solution.
Q5 | A cell increase in volume if the external medium is (Har. PMT 2005)
  • Hypotonic
  • Hypertonic
  • Isotonic
  • None of the above
Answer: Hypotonic
Q6 | If a cell gets reduced in size when placed in solution, the solution is (CPMT 1988, AFMC 2009)
  • Hypertonic
  • Hypotonic
  • Weak
  • Saturated
Answer: Hypertonic
Q7 | In a hypertonic solution a cell’s water potential
  • Decrease
  • Increases
  • First increases then decreases
  • No change
Answer: Decrease
Q8 | An example of selectively permeable membrane is (CPMT 1988)
  • Plasmalemma
  • Cell wall
  • Mitochondrial membrane
  • Chloroplast membrane
Answer: Cell wall
Q9 | When beet root cylinders are washed and then placed in cold water, anthocyanin does not comeout. This indicates that most likely the plasma membrane is (AFMC 1990)
  • Permeable to enthocyanin
  • Impermeable to anthocyanin
  • Differentially permeable to anthocyanin
  • Dead structure
Answer: Dead structure
Q10 | Water potential is equal to (CBSE 1988, AMV 1997)
  • ? S + OP
  • ? S = TP
  • ? P + ? W
  • ? P + ? W
Answer: ? P + ? W
Answer: ? P + ? W
Q11 | Purple cabbage leaves do not pass out colour in cold water but do so in hot water becasue (AFMC 1988)
  • Hot water enters the cell faster
  • Pigment is not soluble in cold water
  • Hot water destroys cell walls
  • Hot water kills plasmalemma and makes it permeable
Answer: Hot water enters the cell faster
Q12 | Which one option does not involve osmosis ? (MPPMT 1991)
  • Water passing from one xylem element to the other above it.
  • Water passing from soil to root hair
  • Water passing into mesophyll cell from xylem
  • Water passing from root hair cell to cortical cell
Answer: Water passing from soil to root hair
Q13 | A bottle filled with previously moistened mustard seeds and water was screw capped tightly andkept in a corner. It blew up suddenly after about half an hour. The phenomenon involved is
  • Diffusion
  • Imbibition
  • Osmosis
  • DPD (CBSE 1990)
Answer: Imbibition
Q14 | When concentration of solutes is low in the soil, absorption of water is (CMPT 1987, KCET 2007)
  • Stopped
  • Increased
  • Retarded
  • Normal
Answer: Normal
Q15 | Guard cells differ from epidermal cells in having. (CPMT 1993, CBSE 2011)
  • Mitochondria
  • Vacuoles
  • Cell wall
  • Chloroplast
Answer: Vacuoles
Q16 | Wilting in plants occurs when (CPMT 1987, 1991, 2002, AFMC 2005, BHU 2006, WB 2008)
  • Phloem is blocked
  • Xylem is removed / blocked
  • Pith is removed
  • A few leaves are removed
Answer: Xylem is removed / blocked
Q17 | Guttation is the process of elimination of water from plants through (BHU 1986, JIPMER 1987, MPPMT 1995, Orissa 2003)
  • Stomata
  • Hydathodes
  • Lenticels
  • Wounds
Answer: Wounds
Q18 | What is the action spectrum of transpiration ? (RPMT 1995, CET Chd. 2006)
  • Green and ultraviolet
  • Orange and red
  • Blue and far red
  • Blue and red
Answer: Green and ultraviolet
Q19 | Stomata open during day time because the guard cells (CPMT 1987)
  • Produce osmotically active sugars or organic acids
  • Are thin walled
  • Are bean shaped
  • Have to help in gaseous exchange
Answer: Have to help in gaseous exchange
Q20 | Stomatal opening is under the control of (KCET 1988, Manipur 2005)
  • Epidemal cell
  • Pallisde cells
  • Spongy cells
  • Guard cells
Answer: Pallisde cells
Q21 | Maximum transpiration takes place from
  • Stem
  • Leaves
  • Roots
  • Flowers and fruits
Answer: Leaves
Q22 | It is produced during water stress that brings stomatal closure. (AMU 1992, CBSE 1993, 1994, 2001, RPMT 2000, JIPMER 2000, Orissa 2009, MP PMt 1992)
  • Ethylene
  • Abscisic acid
  • Ferulic acid
  • Coumarin
Answer: Coumarin
Q23 | Transpiration is least in (CBSE 1998, BHU, 1987, KCET 2006)
  • Good soil moisture
  • Hight wind velocity
  • Dry environment
  • High atmospheric humidity
Answer: Dry environment
Q24 | Transpiration is high in (MP PMT 1993)
  • Rainy season
  • Winter
  • High temperature
  • Low wind velocity
Answer: Low wind velocity
Q25 | Potometer is an instrument that measures (Pb. PMT 1998, Manipur 2005)
  • Respiration
  • Photosynthesis
  • Growth
  • Transpiration
Answer: Transpiration
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