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Class 8 Practice – Level 1 – Microorganisms
Total questions: 40
1.
What are microorganisms?
Small organisms that are visible only under a microscope
Plants that grow in the desert
Animals that live in the ocean
Only bacteria
None
2.
Which of the following is an example of a microorganism?
Cow
Bacteria
Elephant
Tree
None
3.
Which of the following is not a type of microorganism?
Bacteria
Algae
Fungi
Tree
None
4.
Yeast is used in the production of which of the following?
Milk
Bread
Fruits
Clothes
None
5.
Which microorganism causes diseases like the common cold?
Bacteria
Virus
Fungi
Protozoa
None
6.
Which of the following is used to preserve food by killing microorganisms?
Sugar
Oil
Salt
Vinegar
None
7.
Which disease is caused by bacteria?
Typhoid
Malaria
Influenza
Chickenpox
None
8.
Which microorganism is used in the preparation of curd?
Fungi
Bacteria
Virus
Protozoa
None
9.
Which microorganism can only reproduce inside the cells of other living organisms?
Bacteria
Virus
Algae
Fungi
None
10.
Which of the following diseases is caused by protozoa?
Dengue
Malaria
Tuberculosis
Measles
None
11.
Bacteria that convert milk into curd are known as:
Pathogenic bacteria
Anaerobic bacteria
Probiotic bacteria
Photosynthetic bacteria
None
12.
Antibiotics are medicines that destroy which type of microorganism?
Fungi
Virus
Bacteria
Algae
None
13.
Which of the following is an important measure to prevent the spread of communicable diseases?
Boiling water
Sleeping for longer hours
Watching TV
Reading books
None
14.
Which microorganism helps in nitrogen fixation?
Fungi
Viruses
Rhizobium bacteria
Algae
None
15.
Bread mold is an example of which type of microorganism?
Virus
Protozoa
Fungi
Bacteria
None
16.
Food spoilage can be caused by which of the following?
Microorganisms
Sunlight
Cold temperature
Air
None
17.
What is the process of protecting the body from diseases by injecting a small amount of the disease-causing microorganism?
Fermentation
Pasteurization
Immunization
Nitrogen fixation
None
18.
Which of the following is not caused by a virus?
AIDS
Flu
Cholera
Dengue
None
19.
The first vaccine developed by Edward Jenner was against which disease?
Smallpox
Rabies
Typhoid
Polio
None
20.
Mushrooms are classified under which group of microorganisms?
Algae
Protozoa
Fungi
Bacteria
None
21.
Algae are mostly found in which type of environment?
Desert
Freshwater and marine environments
Underground
Dry air
None
22.
Which microorganism plays a key role in the nitrogen cycle by converting atmospheric nitrogen into usable forms?
Fungi
Virus
Rhizobium bacteria
Algae
None
23.
Which of the following can cause food poisoning?
Bacteria
Viruses
Algae
Protozoa
None
24.
Which microorganism is used in the production of alcohol?
Algae
Fungi (Yeast)
Bacteria
Protozoa
None
25.
Which of the following is produced using microorganisms?
Plastic
Antibiotics
Wool
Bread
None
26.
What is pasteurization?
A method of cooling food
A method of boiling food
A method of heating food to kill harmful microorganisms
A method of freezing food
None
27.
Which of the following is a communicable disease?
Diabetes
Asthma
Tuberculosis
Cancer
None
28.
Amoeba is a type of:
Bacteria
Protozoa
Fungi
Algae
None
29.
Which disease is caused by a virus?
Malaria
Cholera
Common cold
Typhoid
None
30.
Alexander Fleming discovered which of the following antibiotics?
Streptomycin
Penicillin
Amoxicillin
Tetracycline
None
31.
Which of the following is a waterborne disease?
Measles
Dengue
Cholera
Tuberculosis
None
32.
Vaccination provides immunity by introducing:
Harmful bacteria
Live viruses
Strong antibiotics
Weakened or dead microorganisms
None
33.
Microorganisms are used in the production of which of the following dairy products?
Cheese
Rice
Wool
Rubber
None
34.
Which of the following microorganisms is known for causing malaria?
Bacteria
Virus
Protozoa
Fungi
None
35.
Which of the following is an example of an algae?
Mushroom
Chlamydomonas
Yeast
Amoeba
None
36.
Which factor does not contribute to food spoilage by microorganisms?
Temperature
Oxygen
Acidity
Sunlight
None
37.
Which of the following diseases is caused by bacteria?
Measles
Typhoid
Rabies
Chickenpox
None
38.
Which of the following is an example of a symbiotic relationship?
Fungi and tree roots
Snake and frog
Cat and mouse
Lion and deer
None
39.
The influenza virus primarily affects which part of the body?
Digestive system
Respiratory system
Nervous system
Circulatory system
None
40.
Which microorganism helps in the decomposition of dead organic matter?
Fungi
Algae
Virus
Protozoa
None
1 out of 40
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