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Micro Organisms 

8th Standard Science Chapter 6 Micro Organisms Model Question Paper

Micro Organisms Model Questions

8th Standard

    Reg.No. :
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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. Common cold in human is caused by __________

    (a)

    plasmodium

    (b)

    influenza

    (c)

    vibrio cholera

    (d)

    aphthovirus

  6. __________ is an acid - loving bacteria

    (a)

    Lactobacillus acidophilus

    (b)

    Pseudomonas

    (c)

    Xanthomonas

    (d)

    Vibrio cholera

    7. 5 x 1 = 5

  7. _______ is prepared from a mould called Penicillium.

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    Penicillin

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

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    Virion

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

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    Monotrichous

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

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    FMD Vaccine

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

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    tsetse fly

    12. 5 x 1 = 5

  12. Nitrogen fixing bacteria

    13. (1)

    Bacteria

  13. Tuberculosis

    14. (2)

    Helicobacer

  14. Edward Jenner

    15. (3)

    Vaccine

  15. Biogas

    16. (4)

    Methanogens

  16. Spirilla

    17. (5)

    Ryizobium
    2 x 2 = 4

  17. Euglena: Protozoan; Albugo: _________

  18. Algae: Grass of water; Lactobacillus: ________

    19. 3 x 2 = 6

  19. The size of bacteria range from 1μm to 5 μm

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

  21. Trichoderma helps to protect roots and central plant pathogens

    22. 4 x 2 = 8

  22. Write the name of any nitrogen fixing bacteria. 

  23. Write the names of any three protozoans.

  24. Who discovered penicillin?

  25. Give any 2 living characters of virus.

    26. 2 x 3 = 6

  26. Write the four types of bacteria, based on their shape.

  27. Why micro organisms are essential for agriculture?

    28. 2 x 5 = 10

  28. Write a short note on bacteria and its structure.

  29. Write a short note on Probiotics.

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