QUESTION PAPER-BIOLOGY-MARCH 2008

QUESTION PAPER-MARCH 2008

IIND PUC –BIOLOGY

TIME: 3 HRS                                                                                                  MAX MARKS: 90

INSTRUCTIONS:   1. Draw diagrams wherever necessary.

                                     2. Unlabelled diagrams do not carry any marks

PART-I   BOTANY

PART-A

ANSWER THE FOLLOWING QUESTIONS IN ONE WORD OR ONE SENTENCE EACH:                 1X5=5

1. What is duramen?

2. Give an example for non-sense codon.

3. Name the phase which is common for both aerobic and anaerobic respiration.

4. Which is the most abundant RNA in the cell?

5. What are complementary cells?

PART-B

ANSWER ANY OF FIVE OF THE FOLLOWING QUESTIONS IN 2-5 SENTENCES EACH:                                                                                                                                                     2X5=10

6. What is semi-conservative method of DNA replication? What is the function of ligase?

7. What is annual ring? List any two differences between tracheids and tracheae.

8. Define the terms:  a) Deplasmolysis    b) Wall Pressure

9. Write any four physiological role of Cytokinin in plants.

10. Describe balsam plant experiment to prove ascent of sap.

11. Define growth. Mention any two growth inhibiting hormones.

PART-C

ANSWER ANY FOUR OF THE FOLLOWING QUESTIONS IN 200-250 WORDS WHEREVER APPLICABLE:                                                                                                             5X4=20

12. Explain translation of protein synthesis.

13. What is gene therapy? Explain the types. Add a note on any four of its applications.

14. Briefly explain tissue culture technique using stem.

15. What are meristems? With a neat labeled diagram, explain the different types of meristems based on their position in the plant body.

16. Explain potassium pump theory.

17.  a) Write the schematic representation of Cyclic photophosphorylation.

       b) What is C4-pathway? Give an example.

 

PART-D

I. ANSWER ANY ONE OF THE FOLLOWING:                                                                  5X1=5

18.  a) Draw a neat labeled diagram of ultra structure of T.S. of Chloroplast.

       b). What is R.Q? Name the organic compound whose RQ value is more than one.

       c) What is Pasteur Effect?

19. Give reasons:

a) DNA fingerprinting cannot be used for distinguishing identical twins.

b) Two strands of DNA cannot be identical.

c) Turgidity or flaccidity of guard cells affects the rate of transpiration.

d) All parthenocarps are seedless fruits.

e) Very high temperature decreases the rate of photosynthesis.

II. (Questions from practical syllabus only). Answer any one of the following:                                                                                                                                                         1×5=5

20. With a neat labeled diagram explain the T.S of dicot root.

21. a) What is the significance of cobalt chloride experiment?

      b) Level of mercury rises in the capillary tube of simple photometer. Why?

      c) Draw a neat labeled diagram of Ganong’s respiroscope experiment.

PART-II –ZOOLOGY

PART-A

ANSWER THE FOLLOWING QUESTIONS IN ONE WORD OR ONE SENTENCE EACH:                 1X5=5

22. Why blood group ‘O” is called universal donor?

23. What is global warming?

24. Name the enzyme which converts fibrinogen to fibrin.

25. What is a spermatid?

26. Define species diversity.

PART-B

ANSWER ANY OF FIVE OF THE FOLLOWING QUESTIONS IN 2-5 SENTENCES EACH:            2X5=10

27. Write a note on erythroblastosis foetalis.

28. List any four consequences of acid rain.

29. What is patenting of life forms?

30. Mention any tow functions of oxytocin.

31. Mention any four causes of infertility on males.

32. What is chloride shift?

PART-C

ANSWER ANY FOUR OF THE FOLLOWING QUESTIONS IN 200-250 WORDS WHEREVER APPLICABLE:                                                                                                                               5X4=20

33. Write about chromosomal complement, cause and symptoms of Down’s syndrome.

34.  a) What is conservation of soil? Mention any two methods of soil conservation.

       b)  Explain the terms:

      i). Endangered species

      ii). Sacred species

      iii). Afforestation

36. What are non-specific body defenses? Explain the role of natural killer cells and interferons.

36. With neat labeled diagram, explain origin and conduction of heart beat.

37. Draw a neat labeled diagram of sagittal section of human brain.

38. What is cleavage? Describe the process of cleavage in frog’s egg.

PART-D

I. ANSWER ANY ONE OF THE FOLLOWING:                                                                     5X1=5

39. What is dialysis?  Briefly explain haemodialysis.

40. a) List any four differences between oogenesis and spermatogenesis.

      b) What is Jaundice? Mention any two types.

      c) Name the amino acid which replaces glutamic acid in sickle cell anemia.

II. (Questions from practical syllabus only). Answer any one of the following:                                                                                                                                                         1×5=5

41. With a neat labeled diagram explain the T.S of Testis.

42. a) Write any four differences between cardiac muscle an smooth muscle.

      b) What are granulocytes? Name any two types.

      c) Sample is mixed with Biuret reagent. There is no change in the coloration. What inference can be drawn from this?

 

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