Transport in Plants Set 5 MCQs

Q1 | Stomata of CAM plants (CBSE 2003)

Are always open

Open during the day and close at might

Open during night and close during the day

Nerve open

Q2 | Choose the correct combination of labelling in potato osmoscope. (Manipal PMT 2004)

a-final level, b-dot pin, c-initial level, d-sugar solution, e-potato tuber

a-initial level, b-dot pin, c-final level, d-water, e-potato tuber

a-final level, b-dot pin, c-initial level, d-water, e-potato tuber

a-final level, b-dot pin, c-initial level, d- water, e-container

Q3 | Stomata open during day time due to (Wardha 2005)

Decrease in pH

Decrease in weater potential

Increase in water potential

Light

Q4 | In tall trees water is absorbed due to (Manipal 2005, Guj. CET 2011)

Transpiration

Root pressure

Capillary action

Photosynthesis

Q5 | Which one is responsible for opening of stomata ? (Guj. CET 2006)

Decrease in CO2 concentration and increse in H+ ion concentration.

Decrease in CO2 cone and decrease in H+ ion concentration.

Increase in CO2 cone and increase in H+ ion cone.

More free H+ ions and less Cl- ions.

Q6 | Cell wall shows (Manipur 2007)

Semi permeability

Differential permeability

Complete permeability

Impermeability

Q7 | Starch of guard cells is converted into PEP through. (Guj. CET 2008)

Hydrolysi

Oxidation

Dephosphorylation

Decarboxylation

Q8 | Energy source responsible for upward flow of water is (COMED K’s -2008)

ATP

Sucrose

Solar heat

Light

Q9 | Guard cells regulate (Orissa 2008, CBSE 2009)

Respiration

Transpiration

Photosynthesis

Photorespiration

Q10 | Most water flow in root occurs via apoplast as (AMV 2009)

Cortical cells are living cells

Cortical cells are loosely arranged

Cortical cells are thin walled

All the above

Q11 | Major loss of water in transpiration occurs through (MHT, CET 2009)

Cuticle

Bark

Hydathodes

Stomata

Q12 | A negative effect of transpiration is (Guj. CET 2010)

Development of water stres

Increase in mineral absorption

Maintanance of leaf temperature

Causing cooling

Q13 | What causes opening of stomata (Guj. CET 2010)

Thin wall of guard cell facing stomatal pore is stretched more, curves in and the pore opens.

Thick wall of guard cell facing stomatal pore is stretched more, moves in and pore opens.

As thin wall of guard cell is stretched less, the guard cell wall facing the stomatal pore moves in and pore opens.

Thick wall of guard cell facing the stomatal pore is strectched less, moves, in and the pore opens.

Q14 | Whose water potential is less than water potential of root hair during water absorption by root hair. (Guj. CET 2011)

Gravitational water

Pure water

Vacuolar sap

Soil solution\

Q15 | Tracheids are less efficient than vessels due to (MHT, CET 2011)

Absense of closed end wall

Uneven thickeningS

Caspirian strips

Presence of tapering end walls

Q16 | The space between plasma membrane and cell wall of a plasmolysed cell surrounded by a hypertonicsolution is occupied by (KCET 2011)

Isotonic solution

Hypotonic solution

Hypertonic solution

Water

Q17 | The process by which water is absorbed by solids like colloids causing them to increase in volume is

Facilitated diffusion

Diffusion

Osmosis

Imbibation

Q18 | Sotmatal opening is influenced by

N2 concentration, CO2 concentration, light

CO2 concentration, temperature, light

N2 concentration, light, temperature

CO2 concentration, N2 concentration, temperature

Q19 | 2% Nacl as compared to 18% glucose solution is

Isotonic

Hypotonic

Hypertonic

None of the above

Q20 | Water absorption by root hairs occurs untill (COMED-K’s 2010)

Concentration of water in the cell sap is higher

Salt concentration in cell sap is higher

They are separated from the soil by a selectively permeable membrane

Water potential is lower

Q21 | Which pathway involves cell wall and inter cellular spaces ? (COMED-K’s 2010)

Vascular pathway

Protoplast pathway

Symplast pathway

Apoplast pathway

Q22 | Glucose is not stored in plants due to its effect in

Decrease in osmotic pressure

Increase in osmotic pressure

Increase in turgor pressure

Decreas in turgor pressure

Q23 | Match the columns :I II(a) Diffusion (1) Hydrophilic substances(b) Osmosis (2) Shrinkage of protoplasm(c) Imbibation (3) Semipermiable membrane(d) Plasmolysis (4) Free movement of ions and gases

(a)-(2),

-(1),

-(4),

-3

Q24 | What does A and B indicate in the diagram ?

A - Epidernal cell, B - Guard cell

A - Guard cell, B - Epidermal cell

A - Thickened wall, B - Epidermal cell

A - Cytoplasmic membrane, B - Guard cell

Q25 | What does A and B indicate in the diagram ?

A - Epidemal Cell, B - Guard cell

A - Guard cell, B - Epidermal cell

A - Thickened wall, B - Epidermal cell

A - Cytoplasmic membrane, B - Guard cell