Biology Question Papers of PUC Karnataka

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Here is the Question Papers of Biology of PUC Karnataka

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 deplasmolysis?

2. Name the dead mechanical tissue in plants.

3. Define Imbibition.

4. Define photophosphorylation.

5. Name an enzyme used as tool in rDNA technology.

PART-B

Answer Any Of Five Of The Following Questions In 2-5 Sentences Each: 2x5=10

6. Mention the differences between DNA and RNA.

7. What are monoclonal antibodies? Mention any two of their applications.

8. Define water potential. Mention its components.

9. Differentiate between exarch and endarch xylem.

10. Differentiate sense and antisense strands of DNA.

11. Mention any four characteristic features of genetic code.

PART-C

Answer Any Four Of The Following Questions In 200-250 Words Wherever Applicable: 5x4=20

12. Explain the structure of stomatal apparatus.

13. a) What are growth inhibitors? (1)

b) Explain any four physiological functions of gibberellins. (2)

c) Write any two practical applications of NAA. (2)

14. Explain the techniques of multiple ovulation and embryo transfer (MOET) in cattle breeding.

15. Describe the process of carbon fixation in dicot plants.

16. Describe extrastelar secondary growth in dicot plants.

17. Explain the steps involved in creating golden rice by recombinant DNA technology.

PART-D

I. Answer Any One Of The Following: 5x1=5

18. Write the schematic representation of TCA (citric acid ) cycle.

19. Give reasons for the following in one sentence each: 1×5=5

a) RQ of fats and proteins is less than one.

b) DNA replication would be incomplete in bacteria if DNA ligase is absent.

c) ATP is called the ‘energy currency of the cell’ in living organisms.

d) Rate of ascent of sap increases with decrease in humidity.

e) Eukaryotic genes are considered as split genes.

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

20. a) Draw a neat labeled diagram f the T.S of Dicot root. (4)

b) On addition of NaHCO3 to water in an experimental set-up, the amount of oxygen evolved in Hydrilla during photosynthesis increases. (1)

21. Describe an experiment to demonstrate aerobic respiration using Ganong’s Respiroscope.

PART-II –Zoology

PART-A

Answer The Following Questions In One Word Or One Sentence Each: 1x5=5

22. Mention the genotypic ratio of a monohybrid cross.

23. What is a pacemaker?

24. What is wild life?

25. Define placenta.

26. Mention the contraceptive device which prevents the implantation of blastocyst.

PART-B

Answer Any Of Five Of The Following Questions In 2-5 Sentences Each: 2x5=10

27. Mention the role of clotting factors in blood clotting according to Best and Taylor’s theory.

28. Mention the pattern of cleavage in frog and the reason for it.

29. Mention the difference between genetic diversity and species diversity.

30. What is green house effect? Mention any two green house gases.

31. What are surface barriers? Mention two examples.

32. What is Y-linked inheritance? Why is hypertrichosis seen only in males?

PART-C

Answer Any Four Of The Following Questions In 200-250 Words Wherever Applicable: 5x4=20

33. a) Explain any two methods of soil conservation. (2)

b) Explain any three anthropocentric causes of biodiversity depletion. (3)

34. a) What is hyperacidity? (1)

b) What is rhinitis? Mention any three of its symptoms. (2)

c) What are narcotic drugs? Mention any two examples for drugs which cause hallucination. (2)

35. Explain the conducting system of human heart. Add a note on the mechanism of conduction of heart beat.

36. State the law of independent assortment. Explain it with the help of an example.

37. Describe the steps involved in the formation of urine.

38. Explain spermatogenesis with a schematic diagram.

PART-D

I. Answer Any One Of The Following: 5X1=5

39. Draw a labeled diagram of the sagittal section of human brain.

40. Give reasons for the following in one sentence each: 1×5=5

a) After a meal the level of insulin in the blood increases.

b) Use of CFCs should be discouraged.

c) Protein digestion is not completed if the intestinal glands do not produce enterokinase.

d) Male is hemizygous for sex linked genes.

e) FSH is called a gametokinetic factor.

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

41. a) Draw a neat labeled diagram of the T.S of bone showing a haversian system (3)

b) Write a test to detect the presence of albumin in the given sample. (2)

42. a) Draw a neat labeled diagram of the T.S of liver showing a hepatic lobule. (3)

b) Write a test to detect the presence of glucose in urine. (2)