RAJASTHAN BOARD SECONDARY EXAMINATION 2010 – SCIENCE PAPER 2

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RAJASTHAN BOARD SECONDARY EXAMINATION 2010 – SCIENCE PAPER 2

1. (i)The ratio of genome and karyotype in human is
(A) 1 : 1 (B) 1 : 2
(C) 2 : 1 (D) 4 : 1.              1/2

(ii) The radioactive elements used in the treatment of tumour are
(A) Cobalt ( Co 60 ) and Cesium ( Cs 137 )
(B) Cobalt ( Co 60 ) and Gold ( Au 198 )
(C) Cobalt ( Co 60 ) and Gallium ( Ga 67 )
(D) Technetium ( Tc 99 ) and Iodine ( I 131 ).                1/2

(iii)The correct statement for colour blind daughter is
(A) Father colour blind, Mother normal
(B) Father colour blind, Mother vector
(C) Father normal, Mother vector
(D) Father normal, Mother colour blind.                       1/2

(iv)The plant name is in Column X and main alkaloid is in Column Y:
Column X                              Column Y
(P) Opium                         (i) Narcotine
(Q) Turmeric                   (ii) Nicotine
(R) Ashvagandha         (iii) Curcumin
(S) Tobacco                     (iv) Somniferine.
The correct sequence of matching is
  P   Q   R   S
(A) ii    iii    i    iv
(B) i     iii    ii   iv
(C) iv   i      ii   iii
(D) i    iii    iv   ii.                                       1/2

2. Write the names of scientists who propounded ‘chromosome theory’.          1/2

3. Which type of trees are found in the regions where rainfall is more in winter and less in summer ?  1/2

4. Which transgenic animal is used to understand the development of cancer in human ?    1/2

5. A person’s jaw does not open properly due to hardening of jaw muscles, who is habitual of taking Gutka. Give the name of probable disease.  1/2

6. Name the syndrome produced by deficiency of Y sex chromosome. Give two symptoms of the syndrome. 1/2+ 1/2= 1

7. Draw a labelled diagram of food web present in the grassland ecosystem. 1

8. What do you mean by Interferon ? 1

9. What are ‘fries’ in fish production ? Write the name of any foreign variety of fish. 1/2+ 1/2= 1

10. Write the scientific name of plant which is known as ‘king of pulses’.The seeds of which plant contain highest amount of protein ?1/2+ 1/2= 1

11. Tomato callus is growing continuously but root and shoot are not developing. Give your suggestion for their development. 3/4+ 3/4=  1 1/2

12. What is point mutation ? Draw only the line diagram of Transition and Transversion types of point mutation. 1/2+ 1 = 1 1/2

13. Explain with reason the effect on plant growth on irrigating by water which contain appropriate quantity of nitric acid. 1 1/2

14. Write the names of three techniques of Medical Science in which
X-ray is applied. 1 1/2

15. What do you mean by organ culture ? Explain one problem and its
remedy for implantation in cultured organ. 1/2 + 1+ 1/2= 1 1/2

16.  Give your two suggestions to hardening the plantlets before
establishing in the field. 1 1/2

17. Define the law of dominance. Give two recessive characters found in man. 1 + 1/2= 1 1/2

18.Write two differences between Apiculture and Sericulture. Give the scientific name of insect which lives on mulberry leaves. 1 + 1/2= 1 1/2

19. Two couples are claiming their right on a baby whose blood group
is O. In the first couple the man’s blood group is A ( IA IA ) and wife’s blood group is O ( Io Io). In the second couple the man’s blood group is O  (Io Io) and wife’s blood group is A ( IA Io). Find out the real parents of the baby with a suitable line diagram. 1 1/2

20. Write the scientific names of pathogens of the following diseases :
(i) Cholera
(ii) Naru
(iii) Gonorrhoea. 1/2+ 1/2+ 1/2= 1 1/2

21. What do you mean by crop rotation ? Give four suggestions for the selection of mixed cropping. Write the difference between mixed cropping and mixed farming. 1 + 2 + 1 = 4

22. What is protoplast fusion ? Explain the mechanism of formation of hybrid cell by protoplast fusion. Draw the suitable labelled diagram of the procedure. 1 + 2 + 1 = 4

23. Draw a labelled diagram of the model of DNA. Explain chemical organisation and molecular structure of DNA. 1 + 3 = 4

                                                        OR

Explain the results of Mendel’s experiment on dihybrid cross up to F2  generation with the help of suitable example and checker board.3 + 1 = 4

24. Explain ‘Hydrophobia’ disease under the following titles :

(i) Name of pathogen
(ii) Infection
(iii) Four symptoms of the disease
(iv) Four measures for prevention and control. 1 + 1 + 1 + 1 = 4
                                                              OR
Explain ‘Tuberculosis’ disease under the following titles :
(i) Name of pathogen
(ii) Infection
(iii) Four symptoms of the disease
(iv) Four measures for prevention and control. 1 + 1 + 1 + 1 = 4