NCERT WATER ABSORPTION AND MINERAL NUTRITION

NCERT WATER ABSORPTION
AND MINERAL NUTRITION

1. Common measurement unit of water potential

a. Bar b. Pascal c. Mega pascal d. All

2. Casperian thickening is formed of

a. Lignin b. Suberub c. Chitin d. Pectin

3. In soaked seeds, there develops large pressure due to

a. Osmosis b. capillary action c. Transpiration pull d. Imbibition

4. Theory of transpiration pull was suggested by

a. Hanstein b. Godlewsky c. Dixon & Jolly d. Beadle & Tatum

5. A plant develops water stress when

a. Transpiration is high & water availability is low

b. Transpiration is low and water availability is high

c. Transpiration is high & water availability is high

d. None of these.

6. Leghemoglobin protects

a. Nitrate reeducates b. Carbonic anhydrase c. Nitroginase d. Trypsin

7. Nitrate reeducates is a flavoprotein containing

a. Zn b. Mo c. B d. Cu

8. Phosphorus is very much essential in the formation of

a. Cell wall b. Chlorophyll c. Nucleic acid d. Auxin

9. The rate of transpiration is doubled after every rise of

a. 20c b.50c c. 100c d. 150c

10. High wind velocity cause

a. Increase in transpiration b. Decrease in transpiration

c. No change d. Stimulate the opening of stomata.

11. Water moves from a region of

a. High water potential to low water potential

b. Low water potential to high water potential

c. High OP to low Op d. Both b&c

12. Sulphur is essential for the formation of

a. Proteins b. Nucleic acid c. A d. Both a&c

13. Nitrites are converted in to nitrates by

a. Nitrosomonas b. Nitrobactor c. Rhizobium d. All

14. In cells glutamic acids are formed by

a. Beta-Oxidation b. Transanmination c. Hydrolysis d. Dehydrogenation

15. Chlorosis and black spots on the leaves are formed due to the deficiency of

a. Mg. b. Ca c. Mn d. S

16. Which elements have great role in the formation of carbohydrates and fat?

a. N.P,K b. N,S,Mg c. C,H,O d. Mn,Mg,Fe

17. Which of the following is a constituent of cell membrane?

a. Mg b. Mn c.P d. Mo

18. Which of the following is no a nitrogen fixing organism?

a. Leguminous plants b. Rhizobium c. Azotobactor d. Clostridium

19. Lichens and Mycorrhiza are typical examples for

a. Symbiosis b. Parasitism c. Saprotrophic condition d. Both a & b

20. Cicer arietenum is associated with

a. Clostridium b. Azotobactor c. Rhizobium d. None

21. According to mass flow hypothesis Minerals are absorbed as a result of

a. Ion exchange b. Imbibition c. Transpiration d. All of these

22. In Plants Molybdenum deficiency may cause-

a. Fe deficiency b. Mn deficiency c. N deficiency d. None of these

23. Bacteriods are associated with

a. Cell walls b. Cell sap c. Cell membranes d. Nucleus

24. Which statement is wrong with regard to amids?

a. They are the integral parts of most proteins b. They contain more Nitrogen

c. They are derived from amino acids d. Glutamate acid is atypical example

25. Which of the following does not influence stomatal movement?

a. Light b. Temperature c. Co2 concentration d. None of these

ANSWERS

1) b & d 2) b 3) d 4) c 5) a 6) a & c 7) b 8) c 9) c 10) d & b

11) a 12) d 13) b 14) b 15) a & c 16) c 17) c 18) a 19) a 20) c

21) c 22) c 23) c 24) d 25) d