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STD: XII BIO-BOTANY Marks : 75 I. Choose the correct answer 14x1=14 1. ICBN was adapted from a) 1990 b) 1975 c) 1978 d) 1985 2. Bicarpellatae includes a) 4 orders and 24 families b) 3 orders and 12 families c) 3 order 9 families d) 6 ord 34 famillies 3. Thirikalamalli binomial name is a) Thespesia populnea b) Malva rotundifolia c) Malvastrum cormendelia d) Gossypium arbore 4. Protoderm gives rise to a) primary vascular tissue b) epidermal tissue c) cortx and pith d) pericycle 5.Bundle cap otherwise known as a) Hard bast b) surface fibre c) medulla d) primary medullary rays 6. It gaint nucleus of the unicellular algae is a) Drosophila b) salamander c) Acetabularia d) E.coli 7. The synthesis of new DNA is a) Topoisomerase b) Helicase c) primase d) ligase 8. Renin inhibitors functions is a) Decreases blood pressure b) treat diabetes c) help of cell resist viruses d) promotes growth children 9. Gamborg medium is a) MS medium b) B5 medium c) k3 medium d) W medium 10. The pigment molecules are present in a photosystem a) 400 to 700 b) 250 to 400 c) 400 to 600 d) 700 to 800 11. Dimorphic chloroplast is present in a) C3 b) C4 c) C5 d) C2 12. Krebs cycle how many direct ATP is produced a) 2 b) 4 c) 38 d) 24 13. Low calorie sweetner substance used by the people of west Africa a) pyrethrum b) Brazzein c) carotene d) lysine 14. Quinine is obtained form a) Cinchona officinalis b) Ephedra sinica c) Agaths d) Jatropha II. Answer the following question any seven 7x3=21 15. Systamatic position of Malvaceae 16. What is cladode? Give an example. 17. Draw and label the parts of Xylem vessel 18. What is protoxylem lacuna? Give an example 19. Draw and label the parts of structure of tRNA 20. What is PEG? Write it is role.

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21. What is photolysis of water? 22. Define vernalization. 23. Write the overall equation of photosynthesis. 24. Define soil reclamation? III. Answer the following question any four Q.No. 25 is compulsory 4x5=20 25. Write about economic importance of Solanaceae 26. Different between monocot root and dicot root 27 . Explain special type of chromosome. 28. Explain Ganong’s respiroscope experiments. 29. Physiological role of Ethylene. 30. Only for outline for C4 cycle. 31. Economic importance of Rice IV. Answer the following question any two 2x10=20 32. Outline for Benthum and Hookers classification. 33. Explain Dicot leaf 34. Explain protoplast fusion method. 35. Outline or explain of Dark reaction. D. RAJAMANI. MSC.,MEd.

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