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

A. Hydrolysi

B. Oxidation

C. Dephosphorylation

D. Decarboxylation

Correct : C. Dephosphorylation

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

A. ATP

B. Sucrose

C. Solar heat

D. Light

Correct : B. Sucrose

3. Guard cells regulate (Orissa 2008, CBSE 2009)

A. Respiration

B. Transpiration

C. Photosynthesis

D. Photorespiration

Correct : B. Transpiration

4. Most water flow in root occurs via apoplast as (AMV 2009)

A. Cortical cells are living cells

B. Cortical cells are loosely arranged

C. Cortical cells are thin walled

D. All the above

Correct : D. All the above

5. Major loss of water in transpiration occurs through (MHT, CET 2009)

A. Cuticle

B. Bark

C. Hydathodes

D. Stomata

Correct : A. Cuticle

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

A. Development of water stres

B. Increase in mineral absorption

C. Maintanance of leaf temperature

D. Causing cooling

Correct : D. Causing cooling

7. What causes opening of stomata (Guj. CET 2010)

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

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

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

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

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

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

A. Gravitational water

B. Pure water

C. Vacuolar sap

D. Soil solution\

Correct : D. Soil solution\

9. Tracheids are less efficient than vessels due to (MHT, CET 2011)

A. Absense of closed end wall

B. Uneven thickeningS

C. Caspirian strips

D. Presence of tapering end walls

Correct : C. Caspirian strips

10. The space between plasma membrane and cell wall of a plasmolysed cell surrounded by a hypertonic solution is occupied by (KCET 2011)

A. Isotonic solution

B. Hypotonic solution

C. Hypertonic solution

D. Water

Correct : D. Water

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

A. Facilitated diffusion

B. Diffusion

C. Osmosis

D. Imbibation

Correct : B. Diffusion

12. Sotmatal opening is influenced by

A. N2 concentration, CO2 concentration, light

B. CO2 concentration, temperature, light

C. N2 concentration, light, temperature

D. CO2 concentration, N2 concentration, temperature

Correct : D. CO2 concentration, N2 concentration, temperature

13. 2% Nacl as compared to 18% glucose solution is

A. Isotonic

B. Hypotonic

C. Hypertonic

D. None of the above

Correct : D. None of the above

14. Water absorption by root hairs occurs untill (COMED-K’s 2010)

A. Concentration of water in the cell sap is higher

B. Salt concentration in cell sap is higher

C. They are separated from the soil by a selectively permeable membrane

D. Water potential is lower

Correct : B. Salt concentration in cell sap is higher

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

A. Vascular pathway

B. Protoplast pathway

C. Symplast pathway

D. Apoplast pathway

Correct : D. Apoplast pathway

16. Glucose is not stored in plants due to its effect in

A. Decrease in osmotic pressure

B. Increase in osmotic pressure

C. Increase in turgor pressure

D. Decreas in turgor pressure

Correct : C. Increase in turgor pressure

17. 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. (a)-(2),

B. -(1),

C. -(4),

D. -(3)

Correct : C. -(4),

18. What does A and B indicate in the diagram ?

A. A - Epidernal cell, B - Guard cell

B. A - Guard cell, B - Epidermal cell

C. A - Thickened wall, B - Epidermal cell

D. A - Cytoplasmic membrane, B - Guard cell

Correct : A. A - Epidernal cell, B - Guard cell

19. What does A and B indicate in the diagram ?

A. A - Epidemal Cell, B - Guard cell

B. A - Guard cell, B - Epidermal cell

C. A - Thickened wall, B - Epidermal cell

D. A - Cytoplasmic membrane, B - Guard cell

Correct : C. A - Thickened wall, B - Epidermal cell

20. Which of the following figure shows the final stage of plasmolysis ?

A. A

B. B

C. C

D. D

Correct : D. D

21. Which of the following figure A, B, C and D shows the initial stage of plasmolysis ?

A. A

B. B

C. C

D. D

Correct : B. B

22. Which process is observed in the diagram ?

A. Imbibition

B. Plasmolysis

C. Osmosis

D. Exosmosis

Correct : C. Osmosis

23. What does A and B indicate in the diagram thistle funnel experment ?

A. A - water, B - concentrated sugar solution

B. A - water, B - sugar

C. A - water, B - dilute sugar solution

D. A - water, B - crystals of sugar

Correct : A. A - water, B - concentrated sugar solution

24. The experimental setup in the given diagram is for ? (KCET 2003)

A. Measuring the rate of transpiration

B. The demostration of development of suction force due to transpiration

C. The demonstration of anaerobic respiration

D. The demonstration of ascent of sap.

Correct : B. The demostration of development of suction force due to transpiration

25. Whatis A and B in this diagram ?

A. A - Apoplast pathway, B - Symplast pathway

B. A - Vacuolar pathway, B - Symplast pathway

C. A - Symplast pathway, B- Vacuolar pathway

D. A - Apoplast pathway, B - Vacuolar pathway

Correct : C. A - Symplast pathway, B- Vacuolar pathway

26. Match the following : Column I Column II (a) Hypotonic (i) Water (b) Hypertonic (ii) Sucrose (c) Solute (iii) Low tonicity (d) Solvent (iv) High tonicity

A. (a-iii), (b-iv), (c-ii), (d-i)

B. (a-iv), (b-ii), (c-i), (d-iii)

C. (a-iii), (b-iv), (c-ii), (d-i)

D. (a-i), (b-ii), (c-iii), (d-iv)

Correct : C. (a-iii), (b-iv), (c-ii), (d-i)

Quiznetik

Biology | Set 39