Rajasthan Board Senior Secondary Examination 2010 – Biology Paper I

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1. (i)Correct pair of plant’s showing pollinium structure is
(A) Calotropis orchids                   (B) Calotropis chenopodium
(C) Orchids chenopodium            (D) Orchids parthenium. 1/2

(ii)Correct pair of plant hormones useful in micro-propagation is

(A) Auxin-Ethylene                         (B) Auxin-Cytokinin
(C) Cytokinin-Ethylene                  (D) Auxin-Gibberellin. 1/2

(iii)Example of hormone produced by genetically modified prokaryote organism is

(A) Humulin                                       (B) Hirudin
(C) Thyroxin                                      (D) Adrenalin. 1/2

(iv) Which bio-technological method is useful to identify the parents of criminals and children ?

(A) Bio-sensor                                   (B) Biofilm
(C) Blood group                                (D) DNA fingerprinting. 1/2

2. If leghaemoglobin pigment is removed from active nodules, what will be its effect on nitrogen fixation ? 1/2

3. Write two effects due to deficiency of Potassium mineral nutrient on plant life. 1/4+ 1/4= 1/2

4. Define net primary productivity in an ecosystem. 1/2

5. Write the names of two plants found in second step of Xerosere on bare rocks. 1/4+ 1/4= 1/2

6. Draw labelled diagram showing pathway of soil water absorption from root hair to xylem in root. 1/2+ 1/2= 1

7. Write the names of four genetic engineering centres of India.4 × 1/4= 1

8. Write two uses of gene chip in medical science. 1/2+ 1/2= 1

9. Write two harmful effects of transgenic plants on human beings.1/2+ 1/2= 1

10. Write two important physiological adaptations occurring in halophytes. 1/2+ 1/2= 1

11.Write botanical names of two medicinal plants and one medicinal use of each plant. 4 × 1/4= 1

12. Write the names of two plants from which Bio diesel is yielded.1/2+ 1/2= 1

13. What do you mean by molecular farming ? Give an example of it.1/2+ 1/2= 1

14. Explain the mechanism of ascent of sap according to transpiration pull. 2

15. Explain the effect on respiration, if oxygen is not available to pyruvic acid.2

16.Write four main differences between respiration and fermentation.4 × 1/2= 2

17. Write the main rules of nomenclature of restriction endonuclease enzymes. 2

18.Classify the xerophytic plants on the basis of drought resistance.Write botanical names of any two xerophytic plants. 1½+ 1/2= 2

19.Name the plant produced by the transferring of gene from plants cereal for protein synthesis in potato plant and write its important characters. 1/2+ 1½= 2

20.Describe the economic and environmental importance of Bioagriculture. 1 + 1 = 2

21. Describe the main objectives of plant breeding in brief. 2

22. Define ideal vector and write four characteristics. Draw labelled diagram of pBR ³²² and describe the structure. 1 + 1 + 1 + 1 = 4

23. Define double fertilization. Explain the development of embryo in dicotyledonous plant. Draw labelled diagram of mature embryo. 1 + 2 + 1 = 4

OR

       Explain pollen-pistil interaction. Describe various methods of entry of pollen tube in the ovule. Draw labelled diagram of any one method. 1 + 2 + 1 = 4

24. Draw labelled diagram of internal structure of chloroplast. Describe the light reaction of photosynthesis and write its importance. 1 + 2 + 1 = 4

OR

       Explain Hatch-Slack cycle with the help of linear diagram and write its importance. 1 + 2 + 1 = 4