Zoology - Microbes in Human Welfare Model Question Paper

12th Standard EM

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Biology

Time : 01:30:00 Hrs
Total Marks : 50
    5 x 1 = 5
  1. Which of the following pair is correctly

    (a)

    Acetobacter aceti - Antibiotics

    (b)

    Methanobacterium - Lactic acid

    (c)

    Penicilium notatum - Acetic acid

    (d)

    Saccharomyces cerevisiae - Ethanol

  2. Which of the following is not involved in nitrogen fixation?

    (a)

    Pseudomonas

    (b)

    Azotobacter

    (c)

    Anabaena

    (d)

    Nostac

  3. CO2 is not released during

    (a)

    Alcoholic fermentation

    (b)

    Lactate fermentation

    (c)

    Aerobic respiration in animals

    (d)

    Aerobic respiration in plants

  4. WorId Biofuel day is observed on_______

    (a)

    10th September

    (b)

    22nd April

    (c)

    10th August

    (d)

    17th October

  5. Aspergillus niger helps to produce________

    (a)

    Citric acid

    (b)

    Acetic acid

    (c)

    Turmeric acid

    (d)

    Lactic acid

  6. 5 x 1 = 5
  7. Paddy field

  8. (1)

    Acetic acid

  9. Acetobatern species

  10. (2)

    E-coli

  11. Biofertilizer

  12. (3)

    Trichoderma polysporum

  13. Humulin

  14. (4)

    Nostoc

  15. Cyclosporin A

  16. (5)

    Rhizobium

    4 x 2 = 8
  17. An example of a probiotic________

  18. Substance which gives flavour to yoghurt______Acetaldehyde.

  19. Dough for idli and dosa is fermented by this organism_____

  20. Queen of drugs _______

  21. 5 x 2 = 10
  22. How is milk converted into curd? Explain the process of curd formation

  23. Give any two bioactive molecules produced by microbes and state their uses.

  24. What is biological oxygen demand?

  25. What are antibiotics?

  26. What is biodiesel?

  27. 4 x 3 = 12
  28. Explain the role of cry-genes in genetically modified crops.

  29. Write the key features of organic farming.

  30. What is SCP?

  31. What is penicillin?

  32. 2 x 5 = 10
  33. List the advantages of biogas plants in rural areas.

  34. What is the key difference between primary and secondary sewage treatment?

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