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All Biology 11 papers

Class 11 · Past paper

Biology 11 past paper 2024

48 published questions in this index. The full practice view lets you work through them and track your own attempts.

14 MCQs34 written questionsPractise this paper

Question index

  1. 1

    Which of the following is a structural protein found in hair and nails?

    MCQ1 marksannual

  2. 1

    Elaborate the role of peroxisomes in plant and animal cells.

    Part B3 marksannual

  3. 1

    Spermatophytes are seeded plants. How did seeds evolve?

    Part C6 marksannual

  4. 2

    **RNA** lacks:

    MCQ1 marksannual

  5. 2

    Relate variety of proteins of plasma membrane with their respective roles. (Any three)

    Part B3 marksannual

  6. 2

    How are influx and efflux of potassium ions involved in regulating opening and closing of stomata? Explain in detail.

    Part C6 marksannual

  7. 3

    High specific heat capacity of water helps in:

    MCQ1 marksannual

  8. 3

    Illustrate the formation of glycosidic bonds in: **a.** Sucrose **b.** Maltose

    Part B3 marksannual

  9. 3

    Explain mechanical and chemical digestion in human stomach.

    Part C7 marksannual

  10. 4

    Absorption of different wavelengths by photosynthetic pigments is measured by:

    MCQ1 marksannual

  11. 4

    Illustrate the process of non-cyclic photophosphorylation with labelling.

    Part B3 marksannual

  12. 4

    Describe the structure and functions of Golgi complex. Also draw its diagram.

    Part C7 marksannual

  13. 5

    Justify the significance of amino acid sequence by explaining example of sickle cell haemoglobin.

    Part B3 marksannual

  14. 5

    Give a detailed account of general characteristics of class Aves.

    Part C6 marksannual

  15. 6

    In which phase of bacterial growth does 'only increase in cell size' occur?

    MCQ1 marksannual

  16. 6

    Outline the process of $C_4$ photosynthesis in a flow chart.

    Part B3 marksannual

  17. 6

    Explain steroids and prostaglandins as important group of lipids. Describe their roles in living organisms.

    Part C6 marksannual

  18. 7

    Which of the following is a bacterial disease?

    MCQ1 marksannual

  19. 7

    How do oxidoreductases, hydrolases and lyases work? Also give one example of each group.

    Part B3 marksannual

  20. 7

    Bacteria show parasexuality. Explain transduction and transformation. Also draw diagrams showing processes.

    Part C7 marksannual

  21. 8

    The photosynthetic partner in a lichen is often:

    MCQ1 marksannual

  22. 8

    How does endospore formation occur in bacteria? How does it help bacteria to withstand unfavorable conditions?

    Part B3 marksannual

  23. 8

    What is an electrocardiogram? Explain its different components. Also draw a neat sketch.

    Part C7 marksannual

  24. 9

    The cells supporting herbaceous parts of plants having extra cellular deposition of cellulose and living protoplasm are:

    MCQ1 marksannual

  25. 9

    Describe steps of lytic cycle of bacteriophage.

    Part B3 marksannual

  26. 10

    Liver is **NOT** involved in the synthesis of:

    MCQ1 marksannual

  27. 10

    Explain pathogenic role of fungi in human with their symptoms. (Any three)

    Part B3 marksannual

  28. 11

    Which of the following is a characteristic of Chondrichthyes?

    MCQ1 marksannual

  29. 11

    A person was bitten by a snake. Antivenom was injected. **a.** How does antivenom work? **b.** Why was passive immunity preferred?

    Part B3 marksannual

  30. 12

    The cork is produced by:

    MCQ1 marksannual

  31. 13

    T-cells are involved in specific defence. Name any three types of T-cells with their specific roles.

    Part B3 marksannual

  32. 14

    Which phylum consists of pseudocoelomate organisms?

    MCQ1 marksannual

  33. 14

    Write about evolutionary adaptations in phylum Arthropoda regarding respiration, excretion and nervous system.

    Part B3 marksannual

  34. 15

    Which of the following is a characteristic of monocot plants?

    MCQ1 marksannual

  35. 15

    Briefly explain the flow of blood through heart as regulated by valves.

    Part B3 marksannual

  36. 16

    Write down the steps of swallowing action of bolus in the oral cavity.

    Part B3 marksannual

  37. 17

    Natural rubber is a type of:

    MCQ1 marksannual

  38. 17

    **a.** How does temperature affect the rate of an enzyme-catalyzed reaction? **b.** Compare the optimum temperature of enzymes in humans and thermophilic bacteria in a graph.

    Part B3 marksannual

  39. 18

    Name any three groups of Protista with one salient feature and example of each group.

    Part B3 marksannual

  40. 19

    In **TACT** theory of ascent of sap, how do transpiration and adhesion help in the process?

    Part B3 marksannual

  41. 20

    Name and explain two hypotheses for evolution of single veined leaves.

    Part B3 marksannual

  42. 21

    Complete the table for Phylum distinguishing characters and examples: **a.** Cnidarian **b.** Metameric segmentation **c.** Snail

    Part B3 marksannual

  43. 23

    Write causative agent of cotton leaf curl disease. Also write symptoms and treatment of disease.

    Part B3 marksannual

  44. 24

    Write down the mechanism of translocation in plants.

    Part B3 marksannual

  45. 25

    What are xerophytes? Enlist any four adaptations for their habitat. Also give example.

    Part B3 marksannual

  46. 26

    How is dermis of skin involved in first line of defence?

    Part B3 marksannual

  47. 27

    Name two growth promoters and one growth inhibitor in plants with one major effect of each on plant body.

    Part B3 marksannual

  48. 28

    Write mechanism of irreversible noncompetitive enzyme inhibition with an example.

    Part B3 marksannual

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