Microorganisms Friend & Foe- NCERT 8
26 minutes ago
kalyanireddy
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Preview (20 questions)Show answers
  • Question 1
    30 seconds
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    Q. A preparation of weakened or killed pathogens.
    answer choices
    Bacteria
    Antibiotic Resistance
    Vaccine
    Capsid
  • Question 2
    30 seconds
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    Q. Which of the following is an example of a harmful microorganism?
    answer choices
    Fungi used as antibiotics
    Ecoli on food that makes people sick
    Bacteria found in yogurt.
    Microorganisms helping dead matter to decay
  • Question 3
    900 seconds
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    Q. A student sets up a compost bin outdoors. Inside the bin microorganisms convert the student’s vegetable and paper scraps into rich fertilizer. Which of the following best describes the role that these microorganisms play in natural habitats?
    answer choices
    The microorganisms help balance the numbers of producers and consumers.
    The microorganisms help keep nutrients cycling through the ecosystem.
     The microorganisms turn solar energy into sugars.
    The microorganisms function as autotrophs.
  • Question 4
    120 seconds
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    Q.

    ______________ helps us digest our food and convert it into simple form.

    answer choices

    Bacteria

    Fungi

    Protozoa

    Algae

  • Question 5
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    Q. Bacteria is known as ______________ in an ecosystem when feeding on dead organisms.
    answer choices
    decomposers
    herbivores
    pathogens
    infections
  • Question 6
    30 seconds
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    Q.

    Food preservation can not be done by

    answer choices

    adding salt

    adding sugar

    drying under the sun

    adding kerosene

  • Question 7
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    Q. Fungi is benefical to us because of the following reason:
    answer choices
    They are a source of oxygen
    They can clean up pollution
    They are a source of antibiotics
    They help to clean run off from waste
  • Question 8
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    Q. Which of the following statements are true?
    answer choices
    All microorganisms are bad
    All microorganisms are good
    Some microorganisms are harmful, while some can be helpful
    Microorganisms are too small to do anything to anyone
  • Question 9
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    Q. Which is not an example of a harmful microorganism?
    answer choices
    Mold growing on a kitchen sponge
    Bacteria found in yogurt
    Bacteria that causes turberculosis
    Salmonella on uncooked chicken
  • Question 10
    30 seconds
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    Q.

    What is an antibiotic?

    answer choices

    a rapid spread of a disease around the world

    a type of bacteria living in human cells

    a medicine that attacks harmful microbes

    a disease for which there is no known cure

  • Question 11
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    Q.

    What do bacteria and viruses have in common?

    answer choices

    They both only live for twenty-four hours

    They both are the same size.

    They both can cause serious infectious diseases

    They both are good and help our immune system.

  • Question 12
    20 seconds
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    Q. Are microorganisms helpful or harmful?
    answer choices
    Helpful
    Harmful
    Both
    Neither
  • Question 13
    20 seconds
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    Q. Yeast makes bread, rolls and cakes rise.
    answer choices
    True
    False
  • Question 14
    20 seconds
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    Q. A piece of bread has a tiny spot of mold growing on it. Is it safe to eat?
    answer choices
    Yes
    No
  • Question 15
    30 seconds
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    Q.

    Yeast is used for making bread. Yeast is a

    answer choices

    plant.

    spice.

    fungi.

    bacteria.

  • Question 16
    30 seconds
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    Q.

    Which statement is NOT true?

    answer choices

    Microorganisms help dead things decay.

    Microorganisms only live in soil.

    Microorganisms cause disease.

    Microorganisms are used to make cheese.

  • Question 17
    30 seconds
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    Q.

    1. Which of the following reproduces only inside a host cell?

    answer choices

    Bacteria

    Amoeba

    Virus

    Fungus

  • Question 18
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    Q.

    Pasteurization is a

    answer choices

    low temperature treatment

    high temperature treatment

    both low and high temperature treatment

    streaming treatment

  • Question 19
    30 seconds
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    Q.

    Bacteria is known as ______________ in an ecosystem when feeding on dead organisms.

    answer choices

    decomposers

    herbivores

    pathogens

    infections

  • Question 20
    30 seconds
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    Q.

    This microorganism uses host cells to make copies of itself

    answer choices

    Protozoa

    Virus

    Fungus

    Bacteria

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