Micro Organisms Model Questions

8th Standard EM

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Science

Time : 01:00:00 Hrs
Total Marks : 50
    6 x 1 = 6
  1. Micro organisms are measured in ______.

    (a)

    cm

    (b)

    mm

    (c)

    micron

    (d)

    meter

  2. ______ is a prokaryotic micro organisms.

    (a)

    Virus

    (b)

    algae

    (c)

    fungi

    (d)

    bacteria

  3. Based on shape, the bacteria are classified into _______ types.

    (a)

    2

    (b)

    3

    (c)

    4

    (d)

    5

  4. _________is a ball-shaped bacteria.

    (a)

    Bacilli

    (b)

    Spinilla

    (c)

    Cocci

    (d)

    Vibrio

  5. Yeast reproduces by __________

    (a)

    Fragmentation

    (b)

    Budding

    (c)

    Sporulation

    (d)

    Sexual method

  6. __________ is an acid - loving bacteria

    (a)

    Lactobacillus acidophilus

    (b)

    Pseudomonas

    (c)

    Xanthomonas

    (d)

    Vibrio cholera

  7. 5 x 1 = 5
  8. _______ is prepared from a mould called Penicillium.

    ()

    Penicillin

  9. The infact virus particle found outside the host cell is _______.

    ()

    Virion

  10. Bacteria, which have a flagellum at one end is classified as _______.

    ()

    Monotrichous

  11. __________ Vaccine is used to cure foot and mouth disease

    ()

    FMD Vaccine

  12. African sleeping sickness is spread by the bite of the__________

    ()

    tsetse fly

  13. 5 x 1 = 5
  14. Nitrogen fixing bacteria

  15. (1)

    Vaccine

  16. Tuberculosis

  17. (2)

    Ryizobium

  18. Edward Jenner

  19. (3)

    Methanogens

  20. Biogas

  21. (4)

    Helicobacer

  22. Spirilla

  23. (5)

    Bacteria

    2 x 2 = 4
  24. Euglena: Protozoan; Albugo: _________

  25. Algae: Grass of water; Lactobacillus: ________

  26. 3 x 2 = 6
  27. The size of bacteria range from 1μm to 5 μm

  28. Hyphae help in transport of nutrients for the growth of mushroom.

  29. Trichoderma helps to protect roots and central plant pathogens

  30. 4 x 2 = 8
  31. Write the name of any nitrogen fixing bacteria. 

  32. Write the names of any three protozoans.

  33. Who discovered penicillin?

  34. Give any 2 living characters of virus.

  35. 2 x 3 = 6
  36. Write the four types of bacteria, based on their shape.

  37. Why micro organisms are essential for agriculture?

  38. 2 x 5 = 10
  39. Write a short note on bacteria and its structure.

  40. Write a short note on Probiotics.

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