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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Transport in Plants Set 1
Q1 | What happens in this figure ?
- Water from beaker will enter the thistle funnel.
- Water from thistle funnel will enter in the beaker.
- Nacl enter from beaker to thistle funnel.
- Osmosis does not occur.
Q2 | A .......... force exists between the walls of xylem vessels and water.
- Cohesion
- Gravitational
- Adhesive
- Transpiration pull
Q3 | The process by which water is forcibly pushed beyond endodermis of root is known as ......... .
- Apoplast pathway
- Symplast pathway
- Diffusion
- Transmembrane transport
Q4 | By which type of transpiration largest amount of water is lost ?
- Guttation
- Cuticular
- Stomata
- Lenticular
Q5 | The value of osmotic pressure depends on .......... .
- Concentration of solute
- Concentration of solvent
- Concentration of solution
- Concentration of substrate
Q6 | If the external solution is more dilute than the cytoplasm is known as .......... .
- Hypertonic
- Hypotonic
- Isotonic
- ‘a’ and ‘b’ both
Q7 | Membrane protein is responsible for transport of
- Water molecule
- Transpiration of H2O
- Active transport
- Passive transport
Q8 | The +ve value of ? P is called ..........
- Osmotic pressure
- Root pressure
- Turgor pressure
- Imbibation pressure
Q9 | What happens in this figure ?
- Exo osmosi
- Endo osmosis
- Cell swollen
- Cell remain in same condition
Q10 | In older dying leaves to younger leaves the mineral ions are assimilated into .......... .
- In organic compound
- Organic compound
- Deposition of Inorganic compound and organic compou
Q11 | Which elements are readily mobilized in plants ?
- S, N, Mo
- K, N, Mo
- P, S, N
- S, N, B
Q12 | In term of fixing CO2, C4 plants are .......... efficient as C3 plants.
- Thrice
- Twice
- Less
- Not
Q13 | When a cell is placed in 0.50M concentrated sugar solution, there is no change in it. So the external solution is called .......... .
- Hypertonic
- Isotonic
- Hypotonic
- Colloidal
Q14 | The pressure that prevails in cell due to number of substances dissolved in cell sap is .......... .
- Wall pressure
- Turgor pressure
- Osmotic pressure
- Diffusion pressure
Q15 | The plasmolysed cells regain turgidity and assume original volume under infuence of hypotonic solution. The process is called
- Plasmolysi
- Deplasmolysis
- Endo osmosis
- Exo osmosis
Q16 | An animalcell placed in pure water will
- Swell up and brust
- Shrink and die
- Shrink and undergo plasmolysis
- Swell up and develop turgidity
Q17 | Passage of water across a selectively permeable membrane is
- Active transport
- Pinocytosis
- Facilitated difusion
- Osmosis
Q18 | Seeds placed in water imbibe the water becasue of
- Exosmosi
- Higher ? W
- Lower ? W
- Pressure of vacuoles
Q19 | In thistle funnel experiment, entry of water into thistle funnel stops after some time automatically due to
- Diffusion of sugar out of thistle funnel.
- External and internal solutions become isotonic.
- Development of hydrostatic pressure in the thistle funnel.
- Development of hydrostatic pressure in the beaker.
Q20 | In plants the process in which loss of water occurs in form of water vapour is
- Respiration
- Guttation
- Transpiration
- Exosmosis
Q21 | Stomatal aperature is surrounded by guard cells and opens when guard cells are
- Flaccid
- Turgid
- Bean shaped
- Dumb-bell shaped
Q22 | Stomatal frequency indicates.
- Number of stomata per unit area
- Rate of water loss
- Rate of gaseous exchange
- Width of stomatal aperature
Q23 | In dorsiventral leaf, the number of stomata per unit area are generally.
- Same on both the surface
- More on lower surface (epidermis)
- More on upper surface (epidermis)
- Absent on upper surface
Q24 | In isobilateral leaf, the number of stomata per unit area are.
- More on upper surface
- More on lower surface
- Approximately same on both the surfaces
- Absent on both the surfaces
Q25 | The loss of water in form of water drops is called.
- Transpiration
- Respiration
- Guttation
- Exosmosis