Check the below NCERT MCQ Questions for Class 8 Science Chapter 2 Microorganisms: Friend and Foe with Answers Pdf free download. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. We have provided Microorganisms: Friend and Foe Class 8 Science MCQs Questions with Answers to help students understand the concept very well.
You can refer to NCERT Solutions for Class 8 Science Chapter 2 Microorganisms: Friend and Foe to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.
Microorganisms: Friend and Foe Class 8 MCQs Questions with Answers
Choose the correct option in the following questions:
Question 1.
Alcohol is produced with the help of
(a) sodium chloride
(b) yeast
(c) nitrogen
(d) carbon dioxide
Answer
Answer: (b) yeast
Question 2.
Which of the following drug is an antipyretic?
(a) Insulin
(b) Alcohol
(c) Streptomycin
(d) Paracetamol
Answer
Answer: (d) Paracetamol
Question 3.
What helps in the rise of bread or dosa dough?
(a) Heat
(b) Grinding
(c) Growth of yeast cells
(d) Low pressure
Answer
Answer: (c) Growth of yeast cells
Question 4.
The status of algae in the aquatic food chain is
(a) consumers
(b) producers
(c) host
(d) small in size
Answer
Answer: (b) producers
Question 5.
The rod shaped bacteria are called
(a) Bacillus
(b) Coccus
(c) Vibrio
(d) Spirillum
Answer
Answer: (a) Bacillus
Question 6.
Bacteria present in root nodules of pea
(a) Coli
(b) Plasmodium
(c) Rhizobium
(d) Penicillin
Answer
Answer: (c) Rhizobium
Question 7.
The microorganism which contains chlorophyll
(a) Virus
(b) Fungus
(c) Algae
(d) All
Answer
Answer: (c) Algae
Question 8.
The disease caused by protozoa is
(a) tuberculosis
(b) polio
(c) typhoid
(d) malaria
Answer
Answer: (d) malaria
Question 9.
Which cannot fix atmospheric nitrogen in the soil?
(a) Rhizobium
(b) Clostridium
(c) Azotobacter
(d) Penicillin
Answer
Answer: (d) Penicillin
Question 10.
The disease caused by fungi is
(a) measles
(b) chicken pox
(c) polio
(d) ringworm
Answer
Answer: (d) ringworm
Question 11.
Which bacteria helps in settling of curd?
(a) Rhizobium
(b) Lactobacillus
(c) Vibriocholarae
(d) Bacillus
Answer
Answer: (b) Lactobacillus
Question 12.
Which microorganism causes AIDS?
(a) A protozoa
(b) A bacteria
(c) A virus
(d) An algae
Answer
Answer: (c) A virus
Question 13.
Which of the following disease is spread due to bacteria?
(a) Tuberculosis
(b) Measles
(c) Chicken pox
(d) Polio
Answer
Answer: (a) Tuberculosis
Question 14.
Which of the following is not used as food preservatives?
(a) Salt
(b) Sugar
(c) Vinegar
(d) Methane
Answer
Answer: (d) Methane
Question 15.
The process by which amount of nitrogen remains the same in the atmosphere is known as
(a) fermentation
(b) carbon cycle
(c) nitrogen cycle
(d) photosynthesis
Answer
Answer: (c) nitrogen cycle
Match the following items given in Column ‘A with that in Column ‘B’:
| Column A | Column B |
| Tuberculosis | Edward Jenner |
| Chicken pox | Fleming |
| Malaria | L. Pasteur |
| Rust of wheat | HIV |
| Pasteurization | Fungi |
| Antibiotic | Virus |
| Vaccination | Bacteria |
| AIDS | Protozoa |
Answer
Answer:
| Column A | Column B |
| Tuberculosis | Bacteria |
| Chicken pox | Virus |
| Malaria | Protozoa |
| Rust of wheat | Fungi |
| Pasteurization | L. Pasteur |
| Antibiotic | Fleming |
| Vaccination | Edward Jenner |
| AIDS | HIV |
Fill in the blanks with appropriate words:
1. ………….. are the smallest of all microorganisms.
Answer
Answer: Viruses
2. Fungi consist of two main groups of organisms ………….. and moulds.
Answer
Answer: yeast
3. Moulds are aerobic but some yeasts can survive in both aerobic and ………….. conditions.
Answer
Answer: anaerobic
4. The presence of ………….. and the warmth stimulate rapid growth of the yeast cells.
Answer
Answer: sugar
5. Algae are ………….. like organisms and contain chlorophyll.
Answer
Answer: plants
6. Agar is made from a type of red …………..
Answer
Answer: algae
7. Protozoa are ………….. just as algae are plant like.
Answer
Answer: animal like
8. Paramecium is slipper-shaped ………….. and possesses a ………….. for its transport.
Answer
Answer: protozoa, cilia
9. Viruses use the energy of the ………….. cells to reproduce themselves.
Answer
Answer: host
10. Cholera, chicken pox are some well-known examples of ………….. diseases.
Answer
Answer: communicable
11. Carriers of specific microorganisms are called …………..
Answer
Answer: Lactobacillus.
State whether the statements given below are True or False:
1. Microorganisms can be found only in air and water.
Answer
Answer: False
2. Protozoa cause diseases like dysentery and malaria.
Answer
Answer: True
3. Jams, jellies and squashes are preserved by adding salt.
Answer
Answer: False
4. Some bacteria and blue green algae present in the soil fix nitrogen from atmosphere and convert into nitrogenous compounds.
Answer
Answer: True
5. Anthrax is a dangerous human and cattle disease caused by a bacterium.
Answer
Answer: True.
We hope the given NCERT MCQ Questions for Class 8 Science Chapter 2 Microorganisms: Friend and Foe with Answers Pdf free download will help you. If you have any queries regarding Microorganisms: Friend and Foe CBSE Class 8 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.