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Zoology - Microbes in Human Welfare Practice Question Paper

12th Standard

    Reg.No. :
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Biology

Time : 01:00:00 Hrs
Total Marks : 40
    5 x 1 = 5
  1. The gases produced in anaerobic sludge digesters are

    (a)

    Methane, oxygen and hydrogen sulphide

    (b)

    Hydrogen sulphide, methane and sulphur dioxide

    (c)

    Hydrogen sulphide, nitrogen and methane

    (d)

    Methane, hydrogen sulphide and CO2.

  2. ________is not used as a biofertilizer

    (a)

    Bacillus thuringiensis

    (b)

    Rhizobium

    (c)

    Nostoc

    (d)

    Anabaena

  3. Which of the following are likely to be present in deep-sea water?

    (a)

    Archaebacteria

    (b)

    Eubacteria

    (c)

    Blue-green algae

    (d)

    Saprophytic fungi

  4. Tetracycline is a ________________
    (i) bactericidal antibiotic
    (ii) bacteriastatic antibiotic
    (iii) narrow spectrum antibiotic
    (iv) Broad spectrum antibiotic

    (a)

    i and iii

    (b)

    ii and iii

    (c)

    i and iv

    (d)

    ii and iv

  5. Select the correct option denoting the proper sequence of sewage treatment.

    (a)

    Filtration, Sedimentation, Aeration, Biological oxidation and UV radiation

    (b)

    Sedimentation, Filtration, Biological oxidation, Aeration and UV radiation.

    (c)

    Filtration, Aeration, Biological oxidation, Sedimentation and UV radiation.

    (d)

    UV radiation, Sedimentation, Filtration, Biological oxidation and Aeration.

  6. 1 x 1 = 1
  7. _____________ is commonly referred as the Queen of drugs.

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    Penicillin

  8. 1 x 1 = 1
  9. 2. (i) Nucleo polyhedral virus is a biofertilizer 
    (ii) Anand Mohan Chakrabarty obtained patent for GEM.
    (iii) Bt - Cotton is a genetically engineered plant.
    (iv) UV not ideal as an disinfectant in sewage treatment
    (a) i and iv
    (b) i and ii
    (c) ii and iii
    (d) ii and iv

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    ii and iiil

  10. 1 x 2 = 2
  11. Assertion : In a microbial fuel cell bacteria are involved in oxidation only.
    Reason: It helps to produce energy
    Codes:
    A. If both A and R are true and R is correct explanation for A
    B. If both A and R are true but R is not the correct explanation for A
    C. If A is true but R is false
    D. If both A and R are false

  12. 2 x 2 = 4
  13. Meaning of the word antibiotic______

  14. An anaerobic fungus used in bioremediation_______

  15. 1 x 2 = 2
  16. i. Toddy - Vinegar
    ii. Recombinant
    Human insulin - Yeast
    iii. Biodiesel - Cannabis sativa
    iv. Sludge digester - Anaerobic
    (a) ii and iii
    (b) iii only
    (c) i and iv
    (d) iv only

  17. 3 x 2 = 6
  18. Give any two bioactive molecules produced by microbes and state their uses.

  19. Give examples of two antibiotics and their mode of action

  20. Define LAB

  21. 3 x 3 = 9
  22. What is a fermenter or bioreactor?

  23. Both Tetracycline and Streptomycin are broad-spectrum antibiotics yet functionally discriminates. How?

  24. Cyclosporin-A is an immuno supprenant. Suggest anyone area where it can be used efficiently? Explain.

  25. 2 x 5 = 10
  26. List the advantages of biogas plants in rural areas.

  27. Describe the stages of Sewage treatment process

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