Class 8 Microorganisms Friend And Foe CBSE Questions & Answers

Class 8 · Microorganisms Friend And Foe

This is Science Class 8 Microorganisms Friend And Foe CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
What are pondscum?
  • A
    fungi
  • B
    protozoa
  • C
    algae
    Correct
  • D
    bacteria
2
Biogas can be obtained by the action of :
  • A
    algae
  • B
    bacteria
    Correct
  • C
    virus
  • D
    fungi
3
Fungus causing skin disease is :
  • A
    whipworm
  • B
    tapeworm
  • C
    ringworm
    Correct
  • D
    skinworm
4
We can prevent cases of malaria by:
  • A
    allowing water to collect in surroundings
  • B
    avoiding water from collecting anywhere
    Correct
  • C
    avoiding living in the vicinity of malaria patients
  • D
    all the above
5
Hepatitis can be prevented by:
  • A
    drinking boiled water
  • B
    both drinking boiled water and vaccination
    Correct
  • C
    vaccination
  • D
    eating balanced diet
6
Which of the following group of microbes can be consumed as SCPs ?
  • A
    protozoa
  • B
    fungi
  • C
    bacteria
  • D
    algae
    Correct
7
Which of the following is the simplest unicellular animal?
  • A
    Agaricus
  • B
    Azotobacter
  • C
    Amoeba
    Correct
  • D
    AIDS virus
8
Sleeping sickness is caused by a :
  • A
    bacterium
  • B
    virus
  • C
    fungus
  • D
    protozoan
    Correct
9
Profuse growth of algae in water body will:
  • A
    change the bad microbes of water into good ones
  • B
    degrade taste,colour and odour of water
    Correct
  • C
    improve the rate of photosynthesis globally
  • D
    improve the quality of water and make it tasty
10
Baker
  • A
    Saccharomyces officinarum
  • B
    Saccharomyces griseus
  • C
    Saccharomyces bakeriseae
  • D
    Saccharomyces cereviseae
    Correct
11
To prepare jellies and ice creams there is use of:
  • A
    protozoa
  • B
    fungi
  • C
    algae
    Correct
  • D
    bacteria
12
Food and mouth disease occurs in cattle due to:
  • A
    a bacterium
  • B
    a fungus
  • C
    a virus
    Correct
  • D
    a protozoan
13
Potato blight is caused due to :
  • A
    bacteria
  • B
    virus
  • C
    fungi
    Correct
  • D
    protozoa
14
Which instrument is required to view viruses?
  • A
    hand lens
  • B
    compound microscope
  • C
    electron microscope
    Correct
  • D
    simple microscope
15
Match the following :Disease…………………………….causal organismi) food poisoning…………………..a) Vibrio choleraii) pneumonia………………………b) Mycobacterium lepraeiii) cholera………………………….c) Diplococcus pneumoniaiv) malaria…………………………d) Clostridium botulinumv) leprosy………………………….e) Plasmodium falciparum
  • A
    i.d,ii.a,iii.b, iv.e, v.c
  • B
    i.d,ii.c,iii.a, iv.e, v.b
    Correct
  • C
    i.b,ii.d,iii.e, iv.c, v.a
  • D
    i.c,ii.e,iii.d, iv.a, v.b